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                                  EXHIBIT 10.29


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                          DOUBLETREE HOTELS CORPORATION
                     Supplemental Executive Retirement Plan

1.       Introduction

         The Board of Directors of Doubletree Hotels Corporation (the "Company")
         established the Doubletree Hotels Corporation Supplemental Executive
         Retirement Plan (the "Plan") in order to improve the competitive nature
         and overall equity of total retirement income for selected key
         employees and to provide a means to assist the Company in attracting
         and retraining certain mid-career senior management employees. The Plan
         is effective February 15, 1997. The Plan is not a qualified plan under
         the Internal Revenue Code of 1986, as amended (the "Code"), and the
         benefits are paid to participants directly by the Company or by an
         entity established by the Company for the sole purpose of providing
         benefits under this Plan.

2.       Definitions

         (a)      Average Compensation means the average of the Compensation
                  paid to the Participant during the three calendar years,
                  whether or not consecutive, that yields the highest number

         (b)      Beneficiary means the person(s) or entity designated to
                  receive the Plan Benefit in the event both the Participant and
                  Surviving Spouse die before all the required Plan Benefit is
                  paid

         (c)      Board means the Board of Directors of the Company

         (d)      Change in Control is defined as the merger or consolidation of
                  the Company with or into another corporation, the exchange of
                  all or substantially all of the assets of the Company for the
                  securities of another corporation, the acquisition by another
                  corporation or person of all or substantially all of the
                  Company's assets, the acquisition by another corporation or
                  person of more than 50% of the Company's then-outstanding
                  voting stock, or the liquidation of dissolution of the Company
                  (each a "Change of Control", provided, however, that an
                  acquisition by the General Electric Pension Trust or its
                  affiliates, by Canadian Pacific or its affiliates, by Richard
                  Ferris, or by Peter Ueberroth of more than 50% of the
                  Company's then-outstanding voting stock shall not be deemed a
                  Change of Control).

         (e)      Committee means the Compensation Committee of the Board or
                  other Committee of the Board, and any delegate of the
                  Committee, appointed by the Board to administer this Plan



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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 2

         (f)      Compensation means the sum of the base salary and bonus earned
                  by the Participant and paid by the Company for a calendar
                  year. For purposes of this Section 2(f), an Executive's
                  "bonus" for any calendar year shall be the Participant's
                  annual incentive award earned for the calendar year,
                  regardless of whether such award is determined or payable
                  after the end of the calendar year. A Participant's
                  Compensation shall be determined without regard to any
                  compensation reductions or deferrals under Code section 125 or
                  401(k) and without regard to any salary or bonus deferrals
                  under any nonqualified deferred compensation plans of the
                  Company

         (g)      Early Retirement Date means the date prior to the Normal
                  Retirement date which is the first day of the month coincident
                  with or next following a Participant's retirement from the
                  Company after attaining age 55 but prior to attaining age 60

         (h)      Normal Retirement Date means the first day of the month
                  coincident with or next following a Participant's retirement
                  from the Company after attaining age 60

         (i)      Participant means an executive designated according to 
                  Section 3.

         (j)      Participant Vesting Percentage is the product of the number of
                  years of service of the Participant multiplied by 10%, with a
                  maximum of 100%

         (k)      Plan Benefit means an annual benefit payable under the terms
                  of the Plan as defined in Section 5

         (l)      Surviving Spouse means the person to whom the Participant is
                  legally married on the date of death of the Participant and
                  who survives the Participant

         (m)      Total and Permanent Disability means a disability which
                  entitles the Participant to benefits under any long-term
                  disability plan maintained by the Company or, in the absence
                  of such a plan, entitles the Participant to Social Security
                  disability benefits

         (n)      Years of Service means the Participant's total years of
                  service with the Company, as determined by the Committee, for
                  purposes of determining a benefit under this Plan.

3.       Participation

         An Executive shall become a Participant in the Plan if and when
         nominated for participation by the Company's Chief Executive Officer
         and approved by the Committee; provided, however, that participation in
         the Plan by such Chief Executive Officer will occur following
         nomination and approval by the Committee alone.



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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 3

         Upon the recommendation of the Company's Chief Executive Officer, the
         Committee may terminate a Participant's active participation in the
         Plan if there has been, at any time, a reduction in the Participant's
         title, responsibilities (including reporting responsibilities) or
         authority, whether or not such reduction places the Participant below
         any level at which he previously was during the term of the
         Participant's employment with the Company.

         In the case of a termination of active participation described above,
         the affected Participant's Average Compensation will be calculated and
         frozen as of the date of such termination and the participant will be
         entitled to receive a Plan benefit only if the Participant otherwise
         qualifies hereunder. Except for purposes of receiving a vested Plan
         Benefit, participation hereunder shall terminate on the date a
         Participant terminates employment with the Company.

4.       Vesting

         A Participant will vest in the Plan Benefit at the rate of 10% per year
         of service with the Company, unless otherwise determined by the
         Committee. However, in the case of Richard Kelleher and William
         Perocchi, the two participants will have a Participant Vesting
         Percentage of 100% as of the effective date of the Plan. Upon a Change
         of Control, all Participants will have a Participant Vesting Percentage
         of 100%.

5.       Plan Benefit

         (a)      Normal Retirement. Upon retirement at the Normal Retirement
                  Date or later, the Participant will receive a Plan Benefit
                  equal to [(i) x (ii)] where

                  (i) = 60% of Average Compensation
                  (ii) = Participant Vesting Percentage

         (b)      Early Retirement. Upon retirement at an Early Retirement Date,
                  the Participant will receive a Plan Benefit equal to [(i) x
                  (ii)] where

                  (i) = Applicable Percent of Average Compensation from the 
                        chart below
                  (ii) = Participant Vesting Percentage

                  The Applicable Percent varies based upon the Participant's age
                  at Early Retirement as follows

                           Age at                    Applicable
                      Early Retirement                 Percent
                             59                          58%
                             58                          56%
                             57                          54%
                             56                          52%
                             55                          50%



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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 4

                  For purposes of this Plan Benefit, the "Age at Early
                  Retirement" will be the Participant's age closest to the
                  retirement date of the Participant, rounded to the nearest
                  whole year. However, in no case will any Plan Benefit become
                  available until the Participant achieves their 55th birthday.

          (c)     Benefit Upon Termination. Should a Participant terminate
                  employment with the Company after vesting in any Plan Benefit,
                  the Plan Benefit will be calculated based upon the Participant
                  Vesting Percentage using the formula in Section 5 (a) or 5
                  (b), as appropriate, determined based upon the age at which
                  the Participant requests their vested Plan Benefit to begin.

         (d)      Benefit Upon Death or Disability. In the event of a
                  Participant's death prior to receiving any Plan Benefit, any
                  vested benefit will be available to the Participant's Spouse.
                  This Plan Benefit will be calculated based on the
                  Participant's Vesting Percentage as of the date of death. The
                  Plan Benefit will be payable at the request of the Surviving
                  Spouse, starting no earlier than the time the Participant
                  would have reached age 55. The Plan Benefit will be calculated
                  based upon the formula in Section 5(a) or 5(b) as appropriate,
                  determined by the age the Participant would have reached as of
                  the time the Plan Benefit begins.

                  In the event of a Participant's permanent disability prior to
                  receiving any Plan Benefit, any vested Plan Benefit will be
                  available, calculated based on the Participant's Vesting
                  Percentage as of the date of permanent disability. The Plan
                  Benefit will be payable at the request of the Participant
                  beginning no earlier than age 55, with the Plan Benefit
                  calculated based upon Section 5(a) or 5(b), as appropriate,
                  determined by the age of the Participant at the time the Plan
                  Benefit is requested to begin.

         (e)      Change of Control: Upon a change of Control of the Company,
                  the Plan Benefit will be calculated as defined in Section 5(a)
                  for all Participants regardless of their age at retirement.
                  Any Plan Benefit following a Change of Control will be payable
                  starting at the time the Change of Control occurs, or upon the
                  Participant's retirement, whichever is later. In addition,
                  should the Plan Benefit payable upon a Change of Control
                  constitute a Parachute Payment that is subject to the "golden
                  parachute" rules of Code section 280G and the excise tax of
                  Code section 4999, the Company will pay all golden parachute
                  taxes plus an additional amount ("gross up") necessary to
                  cover the taxes on the golden parachute tax payments made on
                  behalf of the Participant by the Company

6.       Form of Payment

                  The following forms of payment of the Plan Benefit are
                  available:



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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 5

          (a)     Joint and Survivor Benefit: The normal form of the Plan
                  Benefit will be payable as a Joint and Survivor benefit,
                  defined as an annuity for the life of the Participant with a
                  survivor annuity for the life of the Surviving Spouse which is
                  equal to 50% of the amount of the annuity which is payable
                  during the joint lives of the Participant and Surviving Spouse
                  and which is the actuarial equivalent of an annuity for the
                  life of the Participant. However, the Plan Benefit will be
                  payable for a minimum of ten years ("Ten Year Certain")
                  starting with the date the Participant elects to receive the
                  Plan Benefit. Should both the Participant and the Surviving
                  Spouse die prior to the payment of the Plan Benefit for ten
                  years, the Plan Benefit payable for the remainder of the Ten
                  Year Certain period would be made to the designated
                  Beneficiary. All Plan Benefits will be paid in 12 equal
                  monthly installments.

         (b)      Lump Sum Benefit: At the time an executive is designated a
                  Participant in the Plan, the Participant may elect to receive
                  a lump sum ("Lump Sum") payment of the Plan Benefit. This Lump
                  Sum payment will be calculated and paid at the date the Plan
                  Benefit begins. The present value for the Lump Sum will be
                  calculated using (i) a discount rate equal to the annual
                  interest rate payable on Five Year Treasury Bills as quoted in
                  the Wall Street Journal as of the date the Plan Benefit
                  begins, and (ii) the GAM Mortality Table.

         (c)      Change of Control: Upon a Change of Control, any Participant
                  who did not elect a Lump Sum, as defined in Section 6(b), may
                  then elect to receive a Lump Sum benefit upon retirement.

7.       Funding

         The Plan Benefit shall be paid from the general assets of the Company.
         The Company in its sole discretion may earmark assets or use other
         means to meet the benefit obligations provided under the Plan. Title to
         and beneficial ownership of any assets which the Company may earmark to
         meet the benefit obligations shall at all times remain in the Company;
         and neither a Participant, Surviving Spouse, or Beneficiary shall have
         any proprietary or property interest whatsoever in any specific assets
         of the Company.

         Nothing contained in the Plan and no action taken pursuant to the
         provisions of the Plan shall create or be construed to create a trust
         of any kind, or a fiduciary relationship between the Company and a
         Participant or any other person. However, notwithstanding the forgoing,
         the Company may use one or more irrevocable grantor trusts as
         mechanisms for funding benefits hereunder. Any assets which may be
         earmarked to meet an the Company's benefit obligation provided under
         the Plan shall continue for all purposes to be part of the general
         funds of the Company and no person other than the Company shall, by
         virtue of the provisions of the Plan, have any interest in such assets.
         The right of a Participant, Surviving Spouse or Beneficiary to a Plan
         Benefit shall be no greater than that of an unsecured general creditor
         of the Company.



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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 6

8.        Miscellaneous Provisions

          (a)     The Plan does not constitute a contract of employment, and
                  participation in the Plan shall not give any Participant the
                  right to be retained in the service of the Company or any
                  right or claim to a Benefit under the Plan, unless such right
                  or claim has specifically accrued under the terms of this
                  document

         (b)      The right of a Participant to the payment of a Plan Benefit
                  under the Plan shall not be assigned, transferred, pledged or
                  encumbered

         (c)      The captions of the articles of the Plan document are inserted
                  for convenience of reference only and shall not be considered
                  in the construction thereof

         (d)      Wherever any word is used herein in the singular form, it
                  shall be construed as though it were used in the plural form,
                  as the context requires, and vice versa

         (e)      A masculine, feminine or neuter pronoun, whenever used herein,
                  shall be construed to include all genders, as the context
                  requires

         (f)      In the event any provision in the Plan document shall be held
                  illegal or invalid for any reason, such illegal or invalid
                  provision shall not affect the remaining provisions hereof,
                  and the Plan document shall be construed and enforced as if
                  such illegal or invalid provision was not contained herein

         (g)      Except to the extent preempted by federal law, this Plan
                  document shall be construed, administered and enforced in
                  accordance with the domestic internal law of the State of
                  Arizona

         (h)      Notwithstanding anything herein to the contrary, any Plan
                  Benefit payable to, or on account of, a Participant shall be
                  forfeited if (i) the Participant admits or is judicially
                  proven to have committed fraud or dishonesty toward the
                  Company (or any business affiliated with the Company, or any
                  individual or company doing business with any of them); or
                  (ii) the Participant is convicted of, or pleads nolo
                  contendere to, a felony not otherwise described in
                  Clause (i) above. In the case of a violation of Clause (i),
                  upon demand of the Company, a Participant shall immediately be
                  obligated to reimburse the Company for all amounts received
                  under this Plan. In the case of a violation of Clause (ii),
                  upon demand of the Company, a Participant shall immediately be
                  obligated to reimburse the Company for all amounts received
                  under the Plan following the first occurrence of an event
                  giving rise to such a visitation.

                           *               *                 *

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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 7

In witness thereof, the Company has caused this Plan document to be executed on
it's behalf, and on behalf of all Participants, by the Committee as of February
15, 1997.

                              DOUBLETREE HOTELS CORPORATION


                          By: /s/ Richard Ferris
                             ----------------------------------
                                        Richard Ferris
                                  Co-Chairman of the Board

 
                       Attest: /s/ William L. Perocchi
                              ---------------------------------
                                           (Name)

                              Exec VP & CFO
                              ---------------------------------
                                           (Title)
                                Doubletree Hotels Corporation


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Doubletree Hotels Corporation
Supplemental Executive Retirement Plan
Page 7

In witness thereof, the Company has caused this Plan document to be executed on
it's behalf, and on behalf of all Participants, by the Committee as of February
15, 1997.

                          DOUBLETREE HOTELS CORPORATION


                       By:  /s/ Richard Ferris
                          ----------------------------------
                                      Richard Ferris
                                  Co-Chairman of the Board

                    Attest: /s/ Richard M. Kelleher
                           ---------------------------------
                                       (Name)

                            President and C.E.O.
                            --------------------------------
                                       (Title)
                              Doubletree Hotels Corporation



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                          DOUBLETREE HOTELS CORPORATION
                     SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
                         Lump Sum Benefit Election Form

I have read the provisions of the Doubletree Hotels Corporation Supplemental
Executive Retirement Plan (the "Plan"), including Section 6 regarding Form of
Payment.

I hereby elect to have the Plan Benefit provided as a Lump Sum Benefit,
calculated as described in Section 6(b) of the Plan.

This election is considered final and cannot be changed unless superseded by an
election form signed and executed on a date following the date shown below.



By:   /s/ William L. Perocchi              Date:   6/5/97
   ----------------------------                 -------------------------
          Name (Signature)

          William L. Perocchi
   ----------------------------
            Name (Print)

Attest: /s/ Richard Ferris                 Date:   6-10-97
       ------------------------                 --------------------------
          Name (Signature)

            Richard Ferris
       ------------------------
             Name (Print)

            Co-Chairman
       ------------------------
       Title (Doubletree Hotels
            Corporation)



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                         DOUBLETREE HOTELS CORPORATION
                     SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
                         Lump Sum Benefit Election Form

I have read the provisions of the Doubletree Hotels Corporation Supplemental
Executive Retirement Plan (the "Plan"), including Section 6 regarding Form of
Payment.

I hereby elect to have the Plan Benefit provided as a Lump Sum Benefit,
calculated as described in Section 6(b) of the Plan.

This election is considered final and cannot be changed unless superseded by an
election form signed and executed on a date following the date shown below.


By:   /s/ Richard M. Kelleher              Date:   6-6-97
   ----------------------------                 -------------------------
          Name (Signature)

          Richard M. Kelleher
   ----------------------------
            Name (Print)

Attest: /s/ Richard Ferris                 Date:   6-10-97
       ------------------------                 --------------------------
          Name (Signature)

            Richard Ferris
       ------------------------
             Name (Print)

            Co-Chairman
       ------------------------
       Title (Doubletree Hotels
            Corporation)


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                                              [DOULETREE CORPORATION LETTERHEAD]


                                December 9, 1997

Richard M. Kelleher
President & Chief Executive Officer
         and
William L. Perocchi
Executive V.P. & Chief Financial Officer

Doubletree Corporation
410 North 44th Street, Suite 700
Phoenix, Arizona 85008

Dear Gentlemen:

         This letter will clarify the application of the Doubletree Hotels
Corporation Supplemental Executive Retirement Plan (the "SERP") upon the
occurrence of a "Change of Control" thereunder. This letter does not represent
an amendment or change to the SERP, nor does it supersede any otherwise
applicable provision of the SERP. All capitalized terms set forth below that are
not defined herein are used as defined in the SERP.

         1. Plan Participants. The only Participants of the SERP, as of the date
of this letter, are Richard M. Kelleher and William L. Perocchi. Both such
Participants have elected a lump-sum form of payment pursuant to Section 6(b) of
the SERP. All SERP benefits of Mr. Kelleher and Mr. Perocchi are fully vested
pursuant to the terms of the SERP.

         2. Plan Benefit. The effect of a Change of Control on a Participant's
Plan Benefit is to increase his Applicable Percent to 60% of Average
Compensation at the time of retirement, regardless of his age at retirement.
This would apply to Participants retiring prior to attaining the Early
Retirement Date under the SERP (age 55), as well as to Participants retiring on
or after such date.

         3. Benefit Commencement. Upon a Change of Control, Plan Benefits are
payable to a Participant at the later of (i) the time of the Change of Control
or (ii) the Participant's retirement. Thus, a Participant who remains employed
following a Change of Control will commence his benefit upon his retirement (or
later date that he may elect through his Normal Retirement Date), based on 60%
of Average Compensation at the time of his retirement.

         4. Benefit Amount. The amount of the Plan Benefit payable as a
lump-sum is calculated using the interest rate and mortality assumptions set
forth in Section 6(b) of the SERP. In the case of a Plan Benefit that commences
prior to a Participant's attainment of the Early Retirement Date (age 55), the
amount of such benefit would be discounted to present value at the time of
payment (using the interest rate applicable under Section 6(b) assuming that the
full 60% Plan Benefit would otherwise have been payable at age 55 (and based on
the mortality



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assumption under Section 6(b) applicable to a Participant retiring at such age).
The amount of any SERP benefit that commences on or after attainment of the
Early Retirement Date would not be discounted.

         5. Proposed Merger. The consummation of the proposed merger
contemplated by the Agreement and Plan of Merger dated September 1, 1997 among
Doubletree Corporation, Promus Hotel Corporation and Parent Holding Corp., will
constitute a Change of Control for purposes of the SERP.










                                            Sincerely,

                                            /s/ Richard J. Ferris

                                            Richard J. Ferris
                                            Co-Chairman of the Board