EXHIBIT 4.1
                                                                     -----------

                                 TRUST AGREEMENT


               TRUST AGREEMENT, between MSDW Structured Asset Corp. (the
"Depositor") and LaSalle Bank National Association (the "Trustee"), made as of
the date set forth in Schedule I attached hereto, which Schedule together with
Schedules II and III attached hereto, are made a part hereof and are hereinafter
referred to collectively as the "Terms Schedule". The terms of the Standard
Terms for Trust Agreements, dated July 7, 1999 (the "Standard Terms") are,
except to the extent otherwise expressly stated, hereby incorporated by
reference herein in their entirety with the same force and effect as though set
forth herein. Capitalized terms used herein and not defined shall have the
meanings defined in the Standard Terms. References to "herein", "hereunder",
"this Trust Agreement" and the like shall include the Terms Schedule attached
hereto and the Standard Terms so incorporated by reference.

               WHEREAS, the Depositor and the Trustee desire to establish the
Trust identified in Schedule I attached hereto (the "Trust") for the primary
purposes of (i) holding the Securities, (ii) entering into any Swap Agreement
with the Swap Counterparty and (iii) issuing the Units;

               WHEREAS, the Depositor desires that the respective beneficial
interests in the Trust be divided into transferable fractional shares, such
shares to be represented by the Units; and

               WHEREAS, the Depositor desires to appoint the Trustee as trustee
of the Trust and the Trustee desires to accept such appointment;

               WHEREAS, the Depositor shall transfer, convey and assign to the
Trust without recourse, and the Trust shall acquire, all of the Depositor's
right, title and interest in and under the Securities and other property
identified in Schedule II to the Trust Agreement (the "Trust Property"); and

               WHEREAS, the Trust agrees to acquire the Trust Property specified
herein in consideration for Units having an initial Unit Principal Balance
identified in Schedule I attached hereto, subject to the terms and conditions
specified in the Trust Agreement;

               NOW THEREFORE, the Depositor hereby appoints the Trustee as
trustee hereunder and hereby requests the Trustee to receive the Securities from
the Depositor and to issue in accordance with the instructions of the Depositor
Units having the terms specified in Schedule I attached hereto, and the Trustee
accepts such appointment and, for itself and its successors and assigns, hereby
declares that it shall hold all the estate, right, title and interest in any
property contributed to the trust account established hereunder (except property
to be applied to the payment or reimbursement of or by the Trustee for any fees
or expenses which under the terms hereof is to be so applied) in trust for the
benefit of all present and future Holders of the fractional shares of beneficial
interest issued hereunder, namely, the Unitholders, and subject to the terms and
provisions hereof and of the Standard Terms.

               IN WITNESS WHEREOF, each of the undersigned has executed this
instrument as of the date set forth in the Terms Schedule attached hereto.

                             LASALLE BANK NATIONAL ASSOCIATION
                                as  Trustee  on  behalf  of  the  Trust
                                identified  in Schedule
                                I hereto, and not in its individual capacity



                             By:     /s/ Brian Ames
                                 ------------------------------
                                 Name:      Brian D. Ames
                                 Title:     Vice President


                             MSDW STRUCTURED ASSET CORP.



                             By:    /s/ John Kehoe
                                 ------------------------------
                                 Name:      John Kehoe
                                 Title:     Vice President



Attachments: Terms Schedule (consisting of Schedules I, II and III)






                                   Schedule I
                           (Terms of Trust and Units)

Trust:                              SATURNS Trust No. 2002-8

Date of Trust Agreement:            July 11, 2002

Trustee:                            LaSalle Bank National Association.
                                    References to Chase Bank of Texas, National
                                    Association in the Standard Terms shall be
                                    inapplicable.

Initial Unit Principal Balance
of the Units:                       $25,000,000

Issue Price:                        100%

Number of Units:                    1,000,000 (Unit Principal Balance of $25
                                    each)

Minimum Denomination:               $25 and $25 increments in excess thereof.
                                    The minimum denomination specified in
                                    Section 5.01(a) of the Standard Terms shall
                                    not apply. Each $25 of Unit Principal
                                    Balance is a Unit.

Cut-off Date:                       July 11, 2002

Closing Date:                       July 11, 2002

Specified Currency:                 United States dollars

Business Day:                       New York, New York and Chicago, Illinois

Interest Rate:                      9.25% per annum on the basis of a 360 day
                                    year consisting of twelve 30 day months.

Interest Reset Period:              Not Applicable

Rating:                             Baa2 by Moody's

                                    BBB by S&P

Rating Agencies:                    Moody's and S&P

Scheduled Final Distribution Date:  March 1, 2031. The Units will have the same
                                    final maturity as the Securities.

Prepayment/Redemption:              The Trust Property is subject to redemption
                                    in accordance with the terms of the
                                    Securities and as described in Schedule II
                                    and is subject to call in accordance with
                                    Schedule III. Any such call or redemption
                                    will cause a redemption of a corresponding
                                    portion of the Units.

                                    If the call rights under the Swap Agreement
                                    are partially exercised or if there is a
                                    partial redemption of the Securities, the
                                    Trustee will randomly select Units to be
                                    redeemed in full from the proceeds of such
                                    partial exercise of the Swap Agreement or
                                    partial redemption of the Securities. If
                                    sufficient funds are not available to redeem
                                    each such redeemed Unit in full, one Unit
                                    may be fractionally redeemed as a result of
                                    each such partial redemption or exercise.

Additional Distribution:            If any of the Securities are redeemed by the
                                    Security Issuer prior to July 11, 2007, each
                                    of the Units being redeemed in connection
                                    with such redemption of Securities (or
                                    related exercise of the call rights under
                                    the Swap Agreement) may receive a pro rata
                                    distribution from the proceeds of the
                                    redemption of the Securities (or related
                                    exercise of the Swap Agreement if physical
                                    settlement applies) remaining, after payment
                                    of principal and interest on the Units and
                                    any amounts payable to the Swap Counterparty
                                    and the Expense Administrator, of up to a
                                    maximum of $2.50 per Unit. The Units will
                                    also receive any additional amounts
                                    available at maturity or upon a redemption
                                    by the Security Issuer if all or a portion
                                    of the Swap Agreement has expired
                                    unexercised.

Corporate Trust Office:             The definition of "Corporate Trust Office"
                                    in the Standard Terms shall not apply.

                                    The Corporate Trust Office shall be the
                                    Trustee's Asset-Backed Securities Trust
                                    Services Group having an office at 135 S.
                                    LaSalle Street, Suite 1625, Chicago,
                                    Illinois 60603 or such other addresses as
                                    the Trustee may designate from time to time
                                    by notice to the Unitholders, the Depositor,
                                    the Swap Counterparty and the Guarantor.

Swap Agreement:                     The ISDA Agreement referred to in Schedule
                                    III. In addition, in connection with an
                                    additional issuance of Units, any additional
                                    Swap Agreement entered into in connection
                                    therewith.

Swap Counterparty:                  Party A to the Swap Agreement referred to in
                                    Schedule III or any assignee thereof. In
                                    addition, in connection with an additional
                                    issuance of Units, Party A to any additional
                                    Swap Agreement or any assignee thereof.

                                    In the event that there is more than one
                                    Swap Counterparty at any time when a partial
                                    redemption of the Securities occurs, the
                                    Trustee shall randomly select which options
                                    under the Swap Agreements shall be selected
                                    for exercise or termination (and receipt of
                                    a Swap Termination Payment).

Guaranty:                           Morgan Stanley (formerly known as Morgan
                                    Stanley Dean Witter & Co., the "Guarantor")
                                    shall guarantee the obligations of Morgan
                                    Stanley & Co. International Limited ("MSIL")
                                    for so long as MSIL is Party A to any Swap
                                    Agreement with the Trust.

Swap Notional Amount:               The notional amount specified in Schedule
                                    III.

Swap Payment Date:                  Not Applicable

Swap Rate:                          Not Applicable

Additional Swap Agreements:         In connection with an additional issuance of
                                    Units, the Depositor may arrange for the
                                    Trust to enter into an additional Swap
                                    Agreement with identical terms to those of
                                    the Swap Agreement entered into as of the
                                    Closing Date with an additional Swap
                                    Counterparty, except that such Swap
                                    Agreement may have a different Swap
                                    Counterparty, number of options, and premium
                                    amount than the Swap Agreement entered into
                                    on the Closing Date. The Rating Agency
                                    Condition must be satisfied with respect to
                                    such additional Swap Agreement.

Distribution Date:                  Each March 1 and September 1, commencing
                                    September 1, 2002.

                                    If any payment with respect to the
                                    Securities held by the Trust is not received
                                    by the Trustee by 12 noon (New York City
                                    time) on a Distribution Date, the
                                    corresponding distribution on the Units will
                                    not occur until the next Business Day that
                                    the Trust is in receipt of proceeds of such
                                    payment prior to 12 noon, with no adjustment
                                    to the amount distributed.

Record Date:                        Each February 15 and August 15, regardless
                                    of whether such day is a Business Day.

Form:                               Global Security

Depositary:                         DTC

Trustee Fees and Expenses:          As compensation for and in payment of trust
                                    expenses related to its services hereunder
                                    other than Extraordinary Trust Expenses, the
                                    Trustee will receive Trustee Fees on each
                                    Distribution Date in the amount equal to
                                    $3,750. The Trustee Fee shall cease to
                                    accrue after termination of the Trust. The
                                    "Trigger Amount" with respect to
                                    Extraordinary Trust Expenses for the Trust
                                    is $25,000 and the Maximum Reimbursable
                                    Amount is $100,000. The Trustee Fee will be
                                    paid by the Expense Administrator. Expenses
                                    will be reimbursed by the Expense
                                    Administrator in accordance with the Expense
                                    Administration Agreement.

Expense Administrator:              The Depositor will act as Expense
                                    Administrator on behalf of the Trust
                                    pursuant to an Expense Administration
                                    Agreement, dated as of the date of the Trust
                                    Agreement (the "Expense Administration
                                    Agreement"), between the Depositor as
                                    Expense Administrator (the "Expense
                                    Administrator") and the Trust.

                                    The Expense Administrator will receive a fee
                                    equal to 0.06% per annum of the principal
                                    amount of the Securities held by the Trust
                                    as its fee, payable on the basis of a 360
                                    day year consisting of twelve 30 day months.
                                    The Expense Administrator's fee is payable
                                    only from available interest receipts
                                    received with respect to the Securities
                                    after application of such receipts to
                                    payment of accrued interest on the Units.

                                    In addition, the Expense Administrator shall
                                    own that portion of the Securities which
                                    represent the interest of a fractional
                                    Unitholder that would remain after a partial
                                    exercise of the Swap Agreement had the Swap
                                    Counterparty not been obligated to pay the
                                    Fractional Unit Make Whole Amount (pursuant
                                    to and as defined in the Swap Agreement and
                                    the Expense Administration Agreement). The
                                    Expense Administrator shall own that portion
                                    of the Securities which represent the
                                    interest of a fractional Unitholder that
                                    would remain after a partial redemption by
                                    the Security Issuer if the Expense
                                    Administrator had not actually paid to the
                                    Trust the amount specified above. The
                                    Expense Administrator shall receive all
                                    interest and principal with respect to such
                                    portion of the Securities.

                                    The Expense Administrator will be
                                    responsible for paying the Trustee Fee and
                                    reimbursing certain other expenses of the
                                    Trust in accordance with the Expense
                                    Administration Agreement.

Listing:                            The Depositor has applied to list the Units
                                    on the New York Stock Exchange

ERISA Restrictions:                 None of the restrictions in the Standard
                                    Terms relating to the Employee Retirement
                                    Income Security Act of 1974, as amended, and
                                    related matters shall apply to the Units.

Alternative ERISA Restrictions:     Not Applicable

Deemed Representations:             Not Applicable

QIB Restriction:                    Not Applicable

Trust Wind-Up Event:                The Trust Wind-Up Events specified in
                                    Sections 9.01(a), 9.01(c), 9.01(d), 9.01(f)
                                    and 9.01(h) shall not apply. The Trust Wind
                                    Events specified in Sections 9.01(b)
                                    (Security Default), 9.01(e) (Early
                                    Termination Date designated due to
                                    "illegality" or "tax event" under the Swap
                                    Agreement), 9.01(g) (Disqualified
                                    Securities), 9.01(i) (Excess Expense Event)
                                    shall apply. Pursuant to Section 9.01(j),
                                    the following events also shall constitute
                                    Trust Wind-Up Events: (i) redemption by the
                                    Security Issuer of all Securities held by
                                    the Trust and (ii) exercise of the call
                                    rights under the Swap Agreement as to all
                                    Securities held by the Trust.

                                    If (i) cash settlement applies under the
                                    Swap Agreement, (ii) a Trust Wind-Up Event
                                    has occurred in connection with the exercise
                                    of any Option under the Swap Agreement and
                                    (iii) the Selling Agent cannot obtain a bid
                                    for the Securities in excess of 100% of the
                                    aggregate Unit Principal Balance of the
                                    Units and accrued interest on the
                                    Securities, then the Securities will not be
                                    sold, the Swap Counterparty's exercise of
                                    the call option will be rescinded (and the
                                    Swap Counterparty shall be entitled to
                                    exercise such options in the future) and any
                                    related Trust Wind-Up Event will be deemed
                                    not to have occurred.

Termination:                        If a Trust Wind-Up Event occurs, any
                                    Securities held by the Trust will be
                                    liquidated (by delivery to the Security
                                    Issuer in the event of a redemption or
                                    pursuant to the terms of the Swap Agreement
                                    in the event of an exercise of the Swap
                                    Agreement).

                                    If the related Trust Wind-Up Event occurs
                                    due to a redemption of the Securities by the
                                    Security Issuer or exercise of the call
                                    rights under the Swap Agreement as to all
                                    Securities held by the Trust, (i) amounts
                                    received as accrued interest on the
                                    Securities will be applied as to amounts
                                    treated as accrued interest on the Units,
                                    (ii) amounts received as principal or par on
                                    the Securities will be applied to the Unit
                                    Principal Balance of the Units up to 100% of
                                    the Unit Principal Balance of each Unit, and
                                    (iii) if prior to July 11, 2007, any amount
                                    received as a make-whole premium or
                                    redemption premium on the Securities will be
                                    applied to the Units up to $2.50 per Unit.
                                    Remaining accrued interest will be applied
                                    to the Expense Administrator's fee. Any
                                    remaining amounts will be paid to the Swap
                                    Counterparty as a Swap Termination Payment
                                    under the Swap Agreement.

                                    If the Trust is terminated for any other
                                    reason, the proceeds of liquidation will be
                                    applied to redeem the Units. If the proceeds
                                    of liquidation exceed the aggregate Unit
                                    Principal Balance and accrued interest on
                                    the Securities, the excess will be paid to
                                    the Swap Counterparty as a Swap Termination
                                    Payment under the Swap Agreement.

Self-Tenders by Security Issuer:    The Trust will not participate in any
                                    self-tender by the Security Issuer for the
                                    Securities and the Trustee will not accept
                                    any instructions to the contrary from the
                                    Unitholders.

Terms of Retained Interest:         The Depositor retains the right to receive
                                    any and all interest that accrues on the
                                    Securities prior to the Closing Date. The
                                    Depositor will receive such accrued interest
                                    on the first Distribution Date for the Units
                                    and such amount shall be paid from the
                                    interest payment made with respect to the
                                    Securities on the first Distribution Date.

                                    The amount of the Retained Interest is
                                    $835,069.

                                    If a Security Default occurs on or prior to
                                    the first Distribution Date and the
                                    Depositor does not receive such Retained
                                    Interest amount in connection with such
                                    Distribution Date, the Depositor will have a
                                    claim for such Retained Interest, and will
                                    share pro rata with holders of the Units to
                                    the extent of such claim in the proceeds
                                    from the recovery on the Securities.

Call Option Terms:                  Not Applicable.

Security Default:                   The definition of Security Default in the
                                    Standard Terms shall not apply. A "Security
                                    Default" shall mean one of the following
                                    events: (i) the acceleration of the
                                    outstanding Securities under the terms of
                                    the Securities and/or the applicable
                                    Security Agreement and failure to pay the
                                    accelerated amount on the acceleration date;
                                    (ii) the failure of the Security Issuer to
                                    pay an installment of principal of, or any
                                    amount of interest due on, the Securities
                                    after the due date thereof and after the
                                    expiration of any applicable grace period;
                                    or (iii) the occurrence of any of the events
                                    of default under such Securities and/or
                                    Security Agreement relating to the
                                    insolvency or bankruptcy of the Security
                                    Issuer.

Sale of Securities:                 If the Trust must sell the Securities it
                                    holds, the Trust will sell the Securities
                                    through the Selling Agent in accordance with
                                    Section 9.03(b) and the following terms. The
                                    Selling Agent must solicit at least three
                                    bids for all of the Securities held by the
                                    Trust. The Selling Agent must solicit at
                                    least three of such bids from registered
                                    broker-dealers of national reputation, but
                                    additional bids may be solicited from one or
                                    more financial institutions or other
                                    counterparties with credit worthiness
                                    acceptable to the Selling Agent in its
                                    discretion. The Selling Agent will, on
                                    behalf of the Trust, sell the Securities at
                                    the highest bid price received. The Selling
                                    Agent may not bid for the Securities.

                                    If cash settlement applies and if the Swap
                                    Counterparty exercises any of its Options
                                    other than in connection with a redemption
                                    of the Securities by the Security Issuer, a
                                    number of Securities corresponding to the
                                    number of Options exercised by the Swap
                                    Counterparty will be sold by the Selling
                                    Agent on behalf of the Trust.

                                    If the Selling Agent cannot obtain a bid for
                                    the Securities in excess of 100% of the
                                    aggregate Unit Principal Balance of the
                                    Units to be redeemed and accrued interest on
                                    the Securities to be sold, then the
                                    Securities will not be sold, the Swap
                                    Counterparty's exercise will be rescinded
                                    (and the Swap Counterparty shall be entitled
                                    to exercise such Option(s) in the future)
                                    and any related Trust Wind-Up Event will be
                                    deemed not to have occurred.

Additional Issuance of Units:       Upon no less than 5 days' notice to the
                                    Trustee, the Depositor may deposit
                                    additional Securities at any time in
                                    exchange for additional Units in a minimum
                                    aggregate amount of $250,000 and, if in
                                    excess of such amount, in a $25 integral
                                    multiple in excess thereof. The principal
                                    amount of Securities deposited must be in
                                    the same ratio to the Unit Principal Balance
                                    of the Units received for such deposit as
                                    the ratio of the aggregate principal amount
                                    of the Securities deposited on the Closing
                                    Date to the aggregate Unit Principal Balance
                                    on the Closing Date. The Depositor must
                                    either arrange for the Swap Counterparty and
                                    the Trust to increase proportionally the
                                    notional amount under the Swap Agreement or
                                    arrange for an additional Swap Agreement to
                                    be entered into between the Trust and an
                                    additional Swap Counterparty. Any accrued
                                    interest will be reflected in the price of
                                    the additional Units and the Securities. The
                                    Rating Agency Condition must be satisfied in
                                    connection with any such additional
                                    issuance.

Selling Agent:                      Morgan Stanley & Co. Incorporated.
                                    Notwithstanding any provision of the
                                    Standard Terms to the contrary, any sale of
                                    the Securities shall be conducted by and
                                    through the Selling Agent and not the
                                    Trustee.

Rating Agency Condition:            The definition of Rating Agencies Condition
                                    in the Standard Terms shall not apply.

                                    "Rating Agency Condition": With respect to
                                    any specified action or determination, means
                                    receipt of (i) oral or written confirmation
                                    by Moody's (for so long as the Units are
                                    outstanding and rated by Moody's) and (ii)
                                    written confirmation by S&P (for so long as
                                    the Units are outstanding and rated by S&P),
                                    that such specified action or determination
                                    will not result in the reduction or
                                    withdrawal of their then-current ratings on
                                    the Units; provided, however, that if the
                                    Rating Agency Condition specified herein is
                                    to be satisfied only with respect to Moody's
                                    or S&P, only clause (i) or clause (ii) shall
                                    be applicable. Such satisfaction may relate
                                    either to a specified transaction or may be
                                    a confirmation with respect to any future
                                    transactions which comply with generally
                                    applicable conditions published by the
                                    applicable rating agency.

Eligible Account:                   The definition of "Eligible Account" in the
                                    Standard Terms shall not apply.

                                    "Eligible Account": A non-interest bearing
                                    account, held in the United States, in the
                                    name of the Trustee for the benefit of the
                                    Trust that is either (i) a segregated
                                    account or segregated accounts maintained
                                    with a Federal or State chartered depository
                                    institution or trust company the short-term
                                    and long-term unsecured debt obligations of
                                    which (or, in the case of a depository
                                    institution or trust company that is the
                                    principal subsidiary of a holding company,
                                    the short-term and long-term unsecured debt
                                    obligations of such holding company) are
                                    rated P-1 and Aa2 by Moody's, A-1+ and AA by
                                    S&P, and, if rated by Fitch, F1 and AA by
                                    Fitch at the time any amounts are held on
                                    deposit therein including when such amounts
                                    are initially deposited and all times
                                    subsequent or (ii) a segregated trust
                                    account or segregated accounts maintained as
                                    a segregated account or as segregated
                                    accounts and held by the Trustee in its
                                    Corporate Trust Office in trust for the
                                    benefit of the Unitholders.

Permitted Investments:              The following shall be a Permitted
                                    Investment in addition to the investments
                                    specified in the Standard Terms:

                                    Units of the Dreyfus Cash Management Fund
                                    Investor Shares or any other money market
                                    funds which are rated in the highest
                                    applicable rating category by each Rating
                                    Agency (or such lower rating if the Rating
                                    Agency Condition is satisfied).

Amendment of Trust Agreement:       Section 12.01(a) of the Standard Terms shall
                                    be replaced with the following:

                                    (a) The Trust Agreement may be amended from
                                    time to time by the Depositor and the
                                    Trustee without the consent of any of the
                                    Unitholders, upon delivery by the Depositor
                                    of an Opinion of Counsel acceptable to the
                                    Trustee to the effect that such amendment
                                    will not materially and adversely affect the
                                    interests of any holder of a Class of Units
                                    that is not voting with respect to such
                                    amendment pursuant to Section 12.01(b), for
                                    any of the following purposes: (i) to cure
                                    any ambiguity or defect or to correct or
                                    supplement any provision in the Trust
                                    Agreement which may be defective or
                                    inconsistent with any other provision in the
                                    Trust Agreement; (ii) to provide for any
                                    other terms or modify any other terms with
                                    respect to matters or questions arising
                                    under the Trust Agreement; (iii) to amend
                                    the definitions of Trigger Amount and
                                    Maximum Reimbursable Amount so as to
                                    increase, but not decrease, the respective
                                    amounts contained in such definitions or to
                                    otherwise amend or waive the terms of
                                    Section 10.05(b) in any manner which shall
                                    not adversely affect the Unitholders in any
                                    material respect; (iv) to amend or correct
                                    or to cure any defect with respect to the
                                    Trustee Fee or Expense Administrator's fee;
                                    (v) to evidence and provide for the
                                    acceptance of appointment under the Trust
                                    Agreement by a successor Trustee; or (vi) to
                                    add or change any of the terms of the Trust
                                    Agreement as shall be necessary to provide
                                    for or facilitate the administration of the
                                    Trust, including any amendment necessary to
                                    ensure the classification of the Trust as a
                                    grantor trust for United States federal
                                    income tax purposes; provided, however, that
                                    in the case of any amendment pursuant to any
                                    of clauses (i) through (vi) above, the
                                    Rating Agency Condition shall be satisfied
                                    with respect to such amendment. If more than
                                    one Class of Units has been issued under the
                                    Trust Agreement, the provisions of this
                                    Section 12.01(a) shall apply to each Class
                                    of Units that is not materially and
                                    adversely affected by such amendment.

                                    Section 12.01(c) shall be re-designated
                                    Section 12.01(d).

                                    Section 12.01(b) shall be re-designated
                                    Section 12.01(c).

                                    The following shall constitute Section
                                    12.01(b):

                                    (b) The Trust Agreement may be amended from
                                    time to time by the Depositor and the
                                    Trustee with the consent of a 100% of the
                                    outstanding Unit Principal Balance of each
                                    Class of Units materially and adversely
                                    affected thereby. The Rating Agency
                                    Condition shall be satisfied with respect to
                                    such amendment unless Units representing
                                    100% of the Unit Principal Balance of all
                                    affected Units vote in favor of such
                                    amendment with notice that the Rating Agency
                                    Condition will not be satisfied.

                                    The following shall constitute Section
                                    12.01(e):

                                    (e) For purposes of this Section 12.01,
                                    Schedule III to any Trust Agreement and any
                                    Swap Agreements entered into in connection
                                    with any related Trust shall not be
                                    considered part of the Trust Agreement.
                                    Section 7.02 shall govern action taken under
                                    the Trust Agreement with respect to any
                                    amendments to such Swap Agreements.

Other Terms:                        The Trust shall not merge or consolidate
                                    with any other trust, entity or person and
                                    the Trust shall not acquire the assets of,
                                    or an interest in, any other trust, entity
                                    or person except as specifically
                                    contemplated herein.

                                    The Trustee shall provide to the Unitholders
                                    copies of any notices it receives with
                                    respect to a redemption of the Securities or
                                    an exercise of the call rights under the
                                    Swap Agreement and any other notices with
                                    respect to the Securities.

                                    The reference to "B2" in the definition of
                                    Certificate in the Standard Terms shall be
                                    replaced with "Exhibit B2".

                                    The reference to "Section 10.02(ix)" in the
                                    definition of Available Funds in the
                                    Standard Terms shall be replaced with
                                    "Section 10.02(a)(ix)".

                                    The reference to "Section 3.04" in the
                                    definition of Unit Account in the Standard
                                    Terms shall be replaced with "Section 3.05".

                                    The transfer by the Depositor to the Trustee
                                    specified in Section 2.01(a) of the Standard
                                    Terms shall be in trust.

                                    Section 2.06 of the Standard Terms shall be
                                    incorporated herein by inserting "cash in an
                                    amount equal to the premium under the Swap
                                    Agreement and" after the phrase
                                    "constituting the Trust Property," therein.

                                    The reference to "calendar day" in the last
                                    sentence of Section 3.06 of the Standard
                                    Terms shall be replaced with "Business Day".

                                    Section 4.02(d) of the Standard Terms shall
                                    be incorporated herein by striking "and the
                                    Trustee on behalf of the Unitholders" from
                                    the first sentence of the second paragraph
                                    thereof.

                                    Section 5.03(c) of the Standard Terms shall
                                    be incorporated herein by striking "(if so
                                    required by the Trustee or the Unit
                                    Registrar)" from the first sentence thereof.

                                    Section 7.01(c)(i) of the Standard Terms
                                    shall be incorporated herein by replacing
                                    the first word thereof ("after") with
                                    "alter".

                                    Section 7.01(c) of the Standard Terms shall
                                    be incorporated herein by inserting "(i)"
                                    between "Securities" and "would" in the
                                    clause that begins "and provided, further,"
                                    and adding at the end of the same sentence
                                    "and (ii) will not alter the classification
                                    of the Trust for Federal income tax
                                    purposes."

                                    Section 7.02 of the Standard Terms shall be
                                    incorporated herein by striking "(i) the
                                    Trustee determines that such amendment will
                                    not adversely affect the interests of the
                                    Unitholders and (ii)" from the first
                                    sentence thereof, inserting "on which it may
                                    conclusively rely" after "Opinion of
                                    Counsel" in such sentence, and striking
                                    "clause (ii)" from the second sentence of
                                    such Section.

                                    For the avoidance of doubt, Section 9.03(c)
                                    of the Standard Terms shall not be
                                    incorporated herein.

                                    Section 9.03(i) of the Standard Terms shall
                                    be incorporated herein by striking "or oral"
                                    after the phrase "at any time by" in the
                                    third sentence thereof.

                                    Clause (ix) of Section 10.02(a) shall not
                                    apply.

                                    Section 10.02(a)(x) of the Standard Terms
                                    shall be replaced with the following:

                                    (x) the Trustee shall have the power to sell
                                    the Securities and other Trust Property, in
                                    accordance with Article IX and XI, through
                                    the Selling Agent or, if the Selling Agent
                                    shall have resigned or declined to sell some
                                    or all of the Securities, any broker
                                    selected by the Trustee (at the direction of
                                    the Depositor) with reasonable care, in an
                                    amount sufficient to pay any amount due to
                                    the Swap Counterparty under the Swap
                                    Agreement (including Termination Payments)
                                    or reimbursable to itself in respect of
                                    unpaid Extraordinary Trust Expenses and to
                                    use the proceeds thereof to make such
                                    payments after the distribution of funds or
                                    Trust Property to Unitholders. Any such
                                    broker shall be instructed by the Trustee to
                                    sell such Trust Property in a reasonable
                                    manner designed to maximize the sale
                                    proceeds.

                                    Section 10.05(b) of the Standard Terms shall
                                    be incorporated herein by replacing ",
                                    pursuant to the first sentence of this
                                    paragraph" with "the Trustee shall be
                                    indemnified by the Trust, however," in the
                                    last sentence thereof.

                                    Section 10.06(a) of the Standard Terms shall
                                    be incorporated herein by inserting "or
                                    association" after the word "corporation" in
                                    the second sentence thereof.

                                    Section 10.07(a) of the Standard Terms shall
                                    be incorporated herein by replacing "notice
                                    or resignation" with "notice of resignation"
                                    in the second sentence thereof and striking
                                    the last two sentences thereof.

                                    Section 10.10(b) of the Standard Terms shall
                                    be incorporated herein by inserting "The
                                    Trustee shall not be liable for the acts or
                                    omissions of any co-trustee." after the last
                                    sentence thereof.

                                    Section 10.14 of the Standard Terms shall be
                                    replaced with the following:

                                    SECTION 10.14. Non-Petition. Prior to the
                                    date that is one year and one day after all
                                    distributions in respect of the Units have
                                    been made, none of the Trustee, the Trust or
                                    the Depositor shall take any action,
                                    institute any proceeding, join in any action
                                    or proceeding or otherwise cause any action
                                    or proceeding against any of the others
                                    under the United States Bankruptcy Code or
                                    any other liquidation, insolvency,
                                    bankruptcy, moratorium, reorganization or
                                    similar law ("Insolvency Law") applicable to
                                    any of them, now or hereafter in effect, or
                                    which would be reasonably likely to cause
                                    any of the others to be subject to, or seek
                                    the protection of, any such Insolvency Law.

                                    Section 12.01(a) of the Standard Terms shall
                                    be incorporated herein by replacing "(v)"
                                    with "(vi)" in the last proviso thereof.

                                    Section 12.01(c) of the Standard Terms shall
                                    be incorporated herein by inserting ",
                                    provided at the expense of the party
                                    requesting such amendment," after "Opinion
                                    of Counsel".

                                    Section 12.05 of the Standard Terms shall be
                                    incorporated herein by striking "the Trustee
                                    and" in the last sentence of the second
                                    paragraph thereof.

                                    The reference to "its President, its
                                    Treasurer, or one of its Vice Presidents,
                                    Assistant Vice Presidents or Trust Officers"
                                    in the first sentence of Section 5.02(a) of
                                    the Standard Terms shall be replaced with "a
                                    Responsible Officer".

                                    The reference to "the proper officers" in
                                    the second sentence of Section 5.02(a) of
                                    the Standard Terms shall be replaced with "a
                                    Responsible Officer".

                                    The reference to "one of its authorized
                                    signatories" in the first sentence of
                                    Section 5.02(d) of the Standard Terms shall
                                    be replaced with "a Responsible Officer".

                                    The reference to the "Trust" in the first
                                    sentence of Section 5.08(b) of the Standard
                                    Terms shall be replaced with the "Trustee".

                                    References to D&P in the Standard Terms
                                    shall be incorporated as references to Fitch
                                    Inc. ("Fitch").






                                   Schedule II
                            (Terms of Trust Property)

Securities:                         AT&T Wireless 8.75% debentures due March 1,
                                    2031

Security Issuer:                    AT&T Wireless Services, Inc.

Principal Amount:                   $26,580,000

Security Rate:                      8.75%

Credit Ratings:                     Baa2 by Moody's

                                    BBB by S&P

Listing:                            Luxembourg Stock Exchange

Security Agreement:                 An indenture dated as of March 6, 2001
                                    between the Security Issuer and the Security
                                    Trustee.

Form:                               Global Security

Currency of
Denomination:                       United States dollars

Acquisition Price by Trust:         91.342927%

Security Payment Date:              Each March 1 and September 1

Original Issue Date:                On or about March 6, 2001

                                    The Security Issuer offered to exchange the
                                    securities then issued for publicly
                                    registered securities and such offering
                                    closed on or about September 1, 2001.

Maturity Date:                      March 1, 2031

Sinking Fund Terms:                 Not Applicable

Redemption Terms:                   The Securities may be redeemed at the option
                                    of the Security Issuer with a make-whole
                                    payment as described in the Security
                                    Agreement. The Security Issuer may also
                                    redeem the Securities upon a "tax event"
                                    without a make-whole payment.

CUSIP No.:/ISIN No.                 00209AAF3

Security Trustee:                   The Bank of New York

Available Information
Regarding the Security Issuer
(if other than U.S.
Treasury obligations):              The Security Issuer is subject to the
                                    informational requirements of the Securities
                                    Exchange Act of 1934, as amended, and in
                                    accordance therewith files reports and other
                                    information with the Securities and Exchange
                                    Commission (the "Commission"). Such reports
                                    and other information can be inspected and
                                    copied at the public reference facilities
                                    maintained by the Commission at 450 Fifth
                                    Street, N.W., Washington, District of
                                    Columbia 20549 and at the following Regional
                                    Offices of the Commission: Woolworth
                                    Building, 233 Broadway, New York, New York
                                    10279, and Northwest Atrium Center, 500 West
                                    Madison Street, Chicago, Illinois 60661.
                                    Copies of such materials can be obtained
                                    from the Public Reference Section of the
                                    Commission at 450 Fifth Street, N.W.,
                                    Washington, District of Columbia 20549 at
                                    prescribed rates.







                                  Schedule III
                              (Call Option Confirm)


Date:     July 11, 2002

To:       SATURNS Trust No. 2002-8         From:     Morgan  Stanley  & Co.
                                                     International Limited

Attn:     Asset-Backed Securities Group    Contact:  Chris Boas
          SATURNS Trust No. 2002-8

Fax:      312-904-2084                     Fax:      212-761-0406

Tel:      312-904-9387                     Tel:      212-761-1395

Re: Bond Option Transaction. MS Reference Number SQ1GD

        The purpose of this letter agreement is to confirm the terms and
conditions of the Transaction entered into between you and Morgan Stanley & Co.
International Limited ("MSIL"), with Morgan Stanley & Co. Incorporated
("MS&Co."), as agent, on the Trade Date specified below (the "Transaction").
This letter agreement constitutes a "Confirmation" as referred to in the
Agreement below.

        The definitions and provisions contained in the 1997 ISDA Government
Bond Option Definitions as published by the International Swaps and Derivatives
Association, Inc. ("ISDA") are incorporated into this Confirmation and this
transaction shall be deemed a "Government Bond Option Transaction" for purposes
of such definitions. In the event of any inconsistency between those definitions
and this Confirmation, this Confirmation will govern.

        1. This Confirmation supplements, forms a part of, and is subject to,
the ISDA Master Agreement dated as of the date hereof, as amended and
supplemented from time to time (the "Agreement"), between you and us. All
provisions contained in the Agreement govern this Confirmation except as
expressly modified below.

         2. The terms of the particular Transaction to which this Confirmation
relates are as follows:

I. General Terms

Trade Date:                           June 25, 2002

Option Style:                         American

Option Type:                          Call

Buyer:                                MSIL ("Party A")

Seller:                               SATURNS Trust No. 2002-8 ("Party B")



Bonds:                                The obligation identified as follows:
                                   
                                      Bond Issuer:           AT&T Wireless Services, Inc.
                                      Issue:                 8.75% debentures due 2031
                                      CUSIP:                 00209AAF3
                                      Coupon:                8.75%
                                      Maturity Date:         March 1, 2031
                                      Face Amount Purchased: USD 26,580,000



Premium:                              USD $66,450

Premium Payment Date:                 July 11, 2002

Number of Options:                    26,580

Option Entitlement:                   USD 1,000 of face amount of the Bonds per
                                      Option.

Strike Price:                         (i) For any Exercise Date prior to July
                                      11, 2007, the redemption price of the
                                      Bonds including any make-whole amount
                                      (expressed as a percentage) subject to a
                                      maximum of 110% of the face amount of the
                                      corresponding portion of the aggregate
                                      Unit Principal Balance (as defined in the
                                      Trust Agreement) but exclusive of accrued
                                      interest or (ii) for any Exercise Date on
                                      or after July 11, 2007, 94.056% of the
                                      face amount of the Bonds exclusive of
                                      accrued interest.


Calculation Agent:                    Party A

II. Exercise Terms

Automatic Exercise:                   Inapplicable

Exercise Period:                      Any Business Day from, and including, 9:00
                                      a.m. (New York time) on July 11, 2007, to,
                                      and including, the Expiration Time on the
                                      Expiration Date; provided, however, the
                                      Exercise Period shall also include any
                                      Business Day prior to July 11, 2007, if
                                      notice of redemption has been delivered by
                                      the Bond Issuer.

Exercise Date:                        For each Option exercised, the day during
                                      the Exercise Period on which that Option
                                      is exercised.

Rescission  of  Exercise  (Cash       If Party B cannot obtain a bid for the
Settlement Only):                     Bonds held by it in excess of the Strike
                                      Price together with accrued interest on
                                      the Bonds, then Party A's notice of
                                      exercise shall be rescinded and the
                                      Options for which notice of exercise was
                                      given shall continue in full force and
                                      effect without regard to such provision of
                                      notice.

Multiple Exercise:                    Applicable

Minimum Number of Options:            1

Written  Confirmation of              Applicable. Buyer shall give irrevocable
Exercise:                             exercise notice which may be given orally
                                      (including by telephone) during the
                                      Exercise Period but no later than the
                                      Notification Date. Buyer will execute and
                                      deliver a written exercise notice
                                      confirming the substance of such oral
                                      notice, however, failure to provide such
                                      written notice will not affect the
                                      validity of the oral notice.

Limitation on Rights of MSIL:         Buyer may, by written notice thereof to
                                      Seller, delegate its rights to provide a
                                      notice of exercise hereunder to a third
                                      party (the "Third Party"). Any such
                                      delegation will be irrevocable by Buyer
                                      without the written consent of the Third
                                      Party. Any such Third Party will have the
                                      same rights and obligations regarding
                                      providing notice of exercise hereunder as
                                      the Buyer had prior to such delegation.
                                      While any such delegation is effective,
                                      Seller will only recognize a notice of
                                      exercise that is provided by the Third
                                      Party.

Notification Date:                    Any date at least 25 calendar days prior
                                      to the Exercise Date.

Limited Right to Confirm              Inapplicable
Exercise:

Expiration Date:                      March 1, 2028

Expiration Time:                      4:00 p.m. New York time

Business Days:                        New York and Chicago

III. Settlements:

Settlement:                           Cash Settlement if MSIL is Party A;
                                      otherwise Physical Settlement. Party A
                                      will notify Party B separately regarding
                                      the clearance system details for Physical
                                      Settlement.

Spot  Price  (Cash   Settlement      The cash proceeds received by Party B in
Only):                               connection with sale of the Bonds by Party
                                      B, excluding any amounts in respect of
                                      accrued interest. In the event of a
                                      redemption by the Bond Issuer, the
                                      redemption price paid by the Bond Issuer,
                                      excluding accrued interest.

Deposit    of   Bond    Payment       Party A must deposit the Bond Payment with
(Physical Settlement Only):           the Trustee on the Business Day prior to
                                      the Exercise Date. The Bonds are to be
                                      delivered "free" to Party A.

Additional  Payment  Obligation       To the Expense Administrator (the "Expense
of Party A:                           Administrator Payment Obligation"):

                                      If the Bond Issuer has not given notice of
                                      redemption in connection with the exercise
                                      of Options hereunder and if any such
                                      exercise is an exercise of less than all
                                      Options remaining unexercised hereunder,
                                      Party A shall pay to the Expense
                                      Administrator an amount equal to the
                                      present value of a stream of payments
                                      equal to $6,575 payable on each payment
                                      date for the Bonds until the maturity of
                                      the Bonds discounted at a rate of 6.0% per
                                      annum on the basis of a 360 day year
                                      consisting of twelve 30 day months from
                                      the date of such exercise until the
                                      Scheduled Final Distribution Date (as
                                      defined in the Trust Agreement), assuming
                                      for this purpose that the Trust (as
                                      defined in the Trust Agreement) is not
                                      terminated prior to the Scheduled Final
                                      Distribution Date, multiplied by the
                                      Option Entitlement multiplied by the
                                      number of Options exercised and divided by
                                      $26,580,000.

                                      To Party B:

                                      Upon any exercise, Party A shall pay to
                                      Party B the Fractional Unit Make Whole
                                      Amount. Party A shall be entitled to
                                      reimbursement of any amounts paid or
                                      netted from payments received in respect
                                      of the Fractional Unit Make Whole Amount
                                      from the Expense Administrator to the
                                      extent, and only to the extent, provided
                                      in the Expense Administration Agreement.

Settlement Date:                      For Cash Settlement, as applicable, the
                                      Business Day of settlement of the sale of
                                      the Bonds by Party B or the Business Day
                                      of settlement of a redemption of Bonds by
                                      the Bond Issuer. For Physical Settlement,
                                      the Exercise Date.


        3.     Additional Definitions.

        "Expense Administration Agreement" means the expense administration
agreement dated as of the date hereof between Party B and the Expense
Administrator.

         "Expense Administrator" means MSDW Structured Asset Corp. acting
pursuant to the Expense Administration Agreement.

        "Fractional Unit Make Whole Amount" means an amount equal to the Unit
Principal Balance (as defined in the Trust Agreement) of any fractional Unit (as
defined in the Trust Agreement) that would remain after any exercise hereunder
if no provision were made to pay to Party B an additional amount equal to such
Unit Principal Balance, together with accrued interest on such fractional Unit
and, if applicable, any Additional Distribution (as defined in the Trust
Agreement) on such fractional Unit.

         "Trust Agreement" means the trust agreement dated as of the date hereof
between the MSDW Structured Asset Corp. and LaSalle Bank National Association.

         4. Representations. Morgan Stanley & Co. Incorporated is acting as
agent for both parties but does not guarantee the performance of Party A.

         5. Additional Termination Event. As set forth in the Agreement, a Trust
Wind-Up Event will result in an Additional Termination Event under the Agreement
with respect to which Party B shall be the Affected Party and this Transaction
shall be an Affected Transaction.

         6. Swap Termination Payments. In the event an Early Termination Date is
designated with respect to which this Transaction is an Affected Transaction,
there shall be payable to Party A as a termination payment in lieu of the
termination payment determined in accordance with Section 6(e) of the Agreement
an amount equal to the excess (if any) of the sale proceeds (or redemption
proceeds), excluding accrued interest, of the Bonds in excess of the Strike
Price.

        7. Assignment. The rights under this Confirmation and the Agreement may
be assigned at any time and from time to time in whole or in part; provided that
the Rating Agency Condition (as defined in the Trust Agreement) is satisfied
with respect to such assignment and any transfer. The transferee in any such
assignment or transfer must be a qualified institutional buyer as defined in
Rule 144A under the Securities Act of 1933.

        8.     Account Details.

Payments to Party A:                   Citibank, N.A., New York
                                       SWIFT BIC Code: CITIUS33
                                       ABA No.  021 000 089
                                       FAO: Morgan Stanley & Co. International
                                       Limited
                                       Account No. 3042-1519

Operations Contact:                    Barbara Kent
                                       Tel  212-537-1449
                                       Fax  212-537-1868

Payments to Party B:                   LaSalle Bank, Chicago, Illinois
                                       ABA No. 071 000 505
                                       Reference:  SATURNS 2002-8
                                       Unit Account / AC-2090067/
                                       Account No.: 67-9040-70-9

Operations Contact:                    Andy Streepey
                                       Tel:  312-904-9387
                                       Fax: 312-904-2084






                                                                  MORGAN STANLEY



        Please confirm that the foregoing correctly sets forth the terms of our
agreement MS Reference Number SQ1GD by executing this Confirmation and returning
it to us.

Best Regards,

MORGAN STANLEY & CO. INTERNATIONAL LIMITED


BY: /s/ Chris Boas
    -----------------------
    Name:  Chris Boas
    Title: Attorney in fact

Acknowledged and agreed as of the date first written above:

SATURNS TRUST NO. 2002-8
BY:  LaSalle Bank National Association,
     solely as Trustee and not in its individual capacity.


BY:  /s/ Brian Ames
    ------------------------
    Name:  Brian Ames
    Title: Vice-President


MORGAN STANLEY & CO. INCORPORATED hereby agrees to and
acknowledges its role as agent for both parties in accordance with
the Schedule to the Agreement.


BY:  /s/ John Kehoe
    ------------------------
    Name:  John Kehoe
    Title: Attorney in fact