EXHIBIT 10.4

THIS  COMMERCIAL  GUARANTY IS SUBJECT TO THAT CERTAIN  SUBORDINATION  AGREEMENT,
DATED OCTOBER 29, 2004,  BETWEEN PCRL INVESTMENTS  L.P., AND OTHERS,  SAME BEING
MORE PARTICULARLY IDENTIFIED AND DESCRIBED AT SECTION 19 BELOW.


                               COMMERCIAL GUARANTY



     COMMERCIAL  GUARANTY (this "Agreement") made and entered into as of October
29, 2004,  by CCBM,  Inc., a Delaware  corporation  (hereinafter  referred to as
"Guarantor"), in favor of PCRL INVESTMENTS L.P., a Texas limited partnership, as
collateral  agent  ("Collateral  Agent")  for itself  and each of the  financial
institutions  (the "Holders")  which now or hereafter  become a holder of any of
the Notes (as defined  below)  pursuant to that certain  Purchase  Agreement (as
defined below), guarantying the Indebtedness (as defined below) of CARRIZO OIL &
GAS, INC., a Texas corporation (hereinafter referred to as "Company").

                                   WITNESSETH:

     FOR VALUE RECEIVED,  and in  consideration  of and for credit and financial
accommodations  extended,  to be extended, or continued to or for the account of
the  above  named  Company,  the  undersigned  Guarantor,   hereby  jointly  and
severally, agrees as follows:

     SECTION 1. Continuing Guaranty of Company's Indebtedness.  Guarantor hereby
absolutely  and  unconditionally  agrees to, and by these  presents does hereby,
guarantee the prompt and punctual  payment,  performance and satisfaction of any
and all notes, loans, extensions of credit and/or other obligations that Company
may now and/or in the future owe to and/or incur in favor of any Holder under or
pursuant to that certain Note Purchase Agreement dated of even date herewith, by
and among Company, the Collateral Agent, and Holders, as the same may be amended
and/or  restated  from time to time and in effect  (the  "Purchase  Agreement"),
including the indebtedness of Company  evidenced by (i) those certain 10% Senior
Subordinated Secured Notes dated of even date herewith, in the maximum aggregate
initial  principal amount of up to  $28,000,000.00  (plus interest added to such
principal amount in accordance with the terms of the Purchase  Agreement and the
Notes),  executed by Company  pursuant to the Purchase  Agreement (the "Notes"),
and  any  and  all  renewals,  extensions,   substitutions,   modifications  and
replacements  of said Notes from time to time and in effect,  and  whether  such
indebtedness  and/or  obligations  are  absolute or  contingent,  liquidated  or
unliquidated,  due or to become  due,  secured or  unsecured,  and  whether  now
existing or hereafter arising, of any nature or kind whatsoever, up to a maximum
principal amount outstanding at any one or more times not to exceed TWENTY-EIGHT
MILLION AND NO/100  DOLLARS (U.S.  $28,000,000.00)  plus  interest  added to the
principal  amount  outstanding  in  accordance  with the  terms of the  Purchase
Agreement  and the Notes,  together with  interest,  costs and  attorneys'  fees
thereon,  (ii) all  obligations,  indebtedness,  and  liabilities,  whether  now
existing or arising in the future,  of the Company to the Collateral  Agent, the
Holders or any  Affiliate  (as defined in the



                                       1


Purchase Agreement) of any Holder pursuant to a Hedging Agreement (as defined in
the  Purchase  Agreement)  or other  commodity or price  management  transaction
(including all renewals, extensions, modifications and substitutions thereof and
therefore)  and  all  cancellations,  buy  backs,  reversals,   terminations  or
assignments of Hedge Agreements,  and (iii) all obligations,  indebtedness,  and
liabilities,  whether now  existing or arising in the future,  of the Company to
the Holders pursuant to that certain  Registration  Rights  Agreement,  dated of
even date  herewith,  by and among the  Company and the  Purchasers,  including,
without  limitation,  all obligations of Company to repurchase  shares of Common
Stock issued in  satisfaction  of the  Indebtedness  described in the  foregoing
clause (i) (with all of Company's  indebtedness and/or obligations  described in
this Section 1 being hereinafter individually and collectively referred to under
this Agreement as "Company's Indebtedness" or the "Indebtedness").

     SECTION 2.  Limitation on Liability.  The liability of Guarantor  hereunder
with  respect to the  Indebtedness  shall be limited  to the  maximum  amount of
liability that can be incurred without rendering this Commercial Guaranty, as it
relates to  Guarantor,  voidable  under  applicable  law relating to  fraudulent
conveyance or fraudulent transfer, and not for any greater amount.

     SECTION 3. Joint and Several  Liability.  Guarantor further agrees that its
obligations and liabilities for the prompt and punctual payment, performance and
satisfaction of all of Company's  Indebtedness shall be on a "joint and several"
basis along with Company to the same degree and extent as if Guarantor  had been
and/or will be a co-borrower,  co-principal  obligor  and/or  co-maker of all of
Company's Indebtedness. In the event that there is more than one guarantor under
this Agreement,  or in the event that there are other  guarantors,  endorsers or
sureties  of  all  or  any  portion  of  Company's   Indebtedness,   Guarantor's
obligations  and  liabilities  hereunder shall be on a "joint and several" basis
along with such other guarantor or guarantors, endorsers and/or sureties.

     SECTION  4.  Duration;   Cancellation  of  Agreement.  This  Agreement  and
Guarantor's obligations and liabilities hereunder shall remain in full force and
effect until such time as each and every  Indebtedness of Company shall be paid,
performed and/or satisfied in full, in principal, interest, costs and attorneys'
fees,  or until  such  time as this  Agreement  may be  cancelled  or  otherwise
terminated by Collateral Agent under a written cancellation  instrument in favor
of Guarantor  (subject to the automatic  reinstatement  provision  hereinbelow).
Unless  otherwise  indicated  under  such  a  written  cancellation  instrument,
Collateral  Agent's  agreement to terminate or otherwise  cancel this  Agreement
shall only  effect and shall be  expressly  limited  to  Guarantor's  continuing
obligations  and  liabilities  to  guarantee  the prompt and  punctual  payment,
performance and  satisfaction  of Company's  Indebtedness  incurred,  originated
and/or  extended or committed to by  Collateral  Agent and/or  Holders after the
date of such a written cancellation  instrument;  with Guarantor remaining fully
obligated and liable under this  Agreement for the prompt and punctual  payment,
performance  and  satisfaction  of any and  all of  Company's  then  outstanding
Indebtedness  together with continuing  assessment of interest thereon) that was
incurred,  originated,  extended  or  committed  to  prior to the date of such a
written cancellation instrument. Nothing under this Agreement or under any other
agreement or  understanding  by and between  Guarantor,  Collateral  Agent,  and
Holders,  shall in any way  obligate,  or be construed  to obligate,  Collateral
Agent and/or Holders to agree to the subsequent


                                       2


termination  or   cancellation   of  Guarantor's   obligations  and  liabilities
hereunder,  it being fully  understood and agreed by Guarantor  that  Collateral
Agent and/or  Holders may,  within their sole and  uncontrolled  discretion  and
judgment,   refuse  to  release  Guarantor  from  any  of  its  obligations  and
liabilities  under this  Agreement  for any reason  whatsoever as long as any of
Company's Indebtedness remains unpaid and outstanding.

     SECTION 5. Default of Company.  Upon the  occurrence of an Event of Default
as provided in the Purchase Agreement,  Guarantor unconditionally and absolutely
agrees to pay in full the then unpaid  amount of all of  Company's  Indebtedness
guaranteed  hereunder,  in principal interest,  costs and reasonable  attorneys'
fees.  Such payment or payments shall be made  immediately  following  demand by
Collateral Agent at its offices at 300 Crescent Court, Suite 700, Dallas,  Texas
75201. Other than the demand referred to in the immediately  preceding sentence,
Guarantor  hereby  waives  notice of  acceptance  of this  Agreement  and of any
Indebtedness  to  which  it  applies  or may  apply.  Guarantor  further  waives
presentation  and  demand  for  payment  of  Company's  Indebtedness,  notice of
dishonor  and of  nonpayment,  notice  of  intention  to  accelerate,  notice of
acceleration,  protest and notice of protest,  collection or  institution of any
suit or other action by Collateral  Agent in collection  thereof,  including any
notice of default in payment  thereof or other  notice to, or demand for payment
thereof on any party.

     SECTION 6.  Guarantor's  Subordination  of Rights to Holders.  In the event
that  Guarantor  should for any reason (i) make any payment for and on behalf of
Company  under any of Company's  Indebtedness,  and/or (ii) make any payments to
Collateral Agent and/or Holders in total or partial  satisfaction of Guarantor's
obligations and liabilities hereunder,  Guarantor hereby agrees that any and all
rights  that  Guarantor  may have or acquire to collect or to be  reimbursed  by
Company (or by any  guarantor,  endorser or surety of  Company's  Indebtedness),
whether  Guarantor's  rights  of  collection  or  reimbursement  arise by way of
subrogation  to the rights of Holders or  otherwise,  shall in all  respects  be
subordinate, inferior and junior to Collateral Agent's and/or Holders' rights to
collect and enforce  payment,  performance  and  satisfaction  of Company's then
remaining  Indebtedness,  until such time as all of  Company's  Indebtedness  is
fully paid and satisfied.  Upon the  occurrence  and  continuance of an Event of
Default  (as defined in the  Purchase  Agreement)  any and all  amounts  owed by
Company to Guarantor shall in all respects be  subordinate,  inferior and junior
to Collateral  Agent's and/or  Holders'  rights to collect and enforce  payment,
performance  and  satisfaction of Company's then remaining  Indebtedness,  until
such  time  as all of  Company's  Indebtedness  is  fully  paid  and  satisfied.
Guarantor  further  agrees to refrain from  attempting to collect and/or enforce
any of Guarantor's  aforesaid  rights against  Company (or any other  guarantor,
surety or endorser of Company's Indebtedness),  arising by way of subrogation or
otherwise,  until such time as all of Company's then remaining  Indebtedness  in
favor of Holders is fully paid and satisfied, in principal,  interest, costs and
attorneys' fees.

     SECTION 7. Additional  Covenants.  Guarantor further agrees that Collateral
Agent and/or Holders may, at its/their  sole option,  at any time, and from time
to time,  without the consent of or notice to Guarantor,  or to any other party,
and without  incurring  any  responsibility  to  Guarantor or to any other party
(other than the Company to the extent  provided


                                       3


in the Documents as such term is defined in the Purchase Agreement), and without
impairing or releasing the obligations of Guarantor under this Agreement:

          (A)  Discharge  or release any party  (including,  but not limited to,
Company  or any  guarantor  under  this  Agreement)  who is or may be  liable to
Collateral Agent and/or Holders for any of Company's Indebtedness;

          (B) Sell, exchange, release, surrender, realize upon or otherwise deal
with,  in any manner and in any order,  any  collateral  directly or  indirectly
securing repayment of any of Company's Indebtedness;

          (C) Change the manner,  place or terms of payment, or change or extend
the time of payment  of or renew,  as often and for such  periods as  Collateral
Agent and/or Holders may determine, or after, any of Company's Indebtedness;

          (D) Settle or compromise any of Company's Indebtedness;

          (E) Subordinate  and/or agree to subordinate the payment of all or any
of Company's  Indebtedness or Collateral Agent's and/or Holders' security rights
in  and/or  to  any  collateral   directly  or  indirectly   securing  any  such
indebtedness,  to the payment and/or security rights of any other present and/or
future creditors of Company;

          (F) Apply any sums paid to any of  Company's  Indebtedness,  with such
payments  being applied in such priority or with such  preferences as Collateral
Agent and/or Holders may determine in its/their sole  discretion,  regardless of
what Indebtedness of Company remains unpaid;

          (G) Take or accept  any  other  security  for any or all of  Company's
Indebtedness; and/or

          (H) Enter into, deliver,  modify,  amend or waive compliance with, any
instrument or arrangement  (other than this Agreement)  evidencing,  securing or
otherwise affecting, all or any part of Company's Indebtedness.

          In  addition,  no  course  of  dealing  between  Collateral  Agent and
Company,  and/or the  Holders and  Company  (or any other  guarantor,  surety or
endorser  of  Company's  Indebtedness),  nor any failure or delay on the part of
Collateral  Agent  and/or  Holders  to  exercise  any of  its/their  rights  and
remedies,  or any other agreement or agreements by and between  Collateral Agent
and  Company  and/or  Holders and  Company  (or any other  guarantor,  surety or
endorser)   shall  have  the  affect  of  impairing  or  releasing   Guarantor's
obligations and liabilities to Collateral Agent and Holders or of waiving any of
Collateral Agent's and/or Holders' rights and remedies.  Any partial exercise of
any rights and  remedies  granted  to  Collateral  Agent  and/or  Holders  shall
furthermore not constitute a waiver of any of Collateral Agent's and/or Holders'
other  rights and  remedies,  it being  Guarantor's  intent and  agreement  that
Collateral  Agent's and Holders'  rights and  remedies  shall be  cumulative  in
nature.  Guarantor  further agrees that, should Company default under any of its
Indebtedness,  any waiver or forbearance on the part of


                                       4


Collateral  Agent and/or Holders to pursue the rights and remedies  available to
Collateral  Agent shall be binding upon Collateral Agent and Holders only to the
extent that Holders specifically agree to such waiver or forbearance in writing.
A waiver or forbearance on the part of Collateral Agent and/or Holders as to one
Event of Default shall not  constitute a waiver of  forbearance  as to any other
Event of Default or Default (as defined in the Purchase Agreement).

     SECTION 8. No Release of Guarantor. Guarantor's obligations and liabilities
under this  Agreement  shall not be  released,  impaired,  reduced or  otherwise
affected by, and shall  continue in full force and effect,  notwithstanding  the
occurrence of any event (other than performance  hereunder),  including  without
limitation any one of the following events:

          (A)  Insolvency,  bankruptcy,  arrangement,  adjustment,  composition,
liquidation,  disability,  dissolution or lack of authority (whether  corporate,
partnership or trust) of Company (or any person acting on Company's behalf),  or
any other guarantor, surety or endorser of any of Company's Indebtedness;

          (B) Partial  payment or payments of any amount due and/or  outstanding
under any of Company's Indebtedness;

          (C) Any payment of Company or any other party to  Collateral  Agent is
held to constitute a preferential  transfer or a fraudulent conveyance under any
applicable law, or for any reason,  Collateral Agent and/or Holders are required
to refund such payment or pay such amount to Company or to any other person;

          (D) Any  dissolution of Company or any sale,  lease or transfer of all
or any part of Company's assets;

          (E) Any  failure  of  Collateral  Agent  to  notify  Guarantor  of the
acceptance  of this  Agreement or of the making of loans or other  extensions of
credit in  reliance on this  Agreement  or of the failure of Company to make any
payment due by Company to Collateral Agent;

          (F) Any application of any sums paid to any of Company's Indebtedness,
with such payments  being applied in such priority or with such  preferences  as
Collateral  Agent and/or  Holders may  determine in  its/their  own  discretion,
regardless of what Indebtedness of Company remains unpaid;

          (G) Any taking or acceptance  of any other  security for any or all of
Company's Indebtedness; and/or

          (H) Any entry into,  delivery,  modification,  amendment  or waiver of
compliance with, any instrument or arrangement evidencing, securing or otherwise
affecting, all or any part of Company's Indebtedness.

          This Agreement and Guarantor's  obligations and liabilities  hereunder
shall continue to be effective,  and/or shall automatically and retroactively be
reinstated if a release or


                                       5


discharge has  occurred,  as the case may be, if at any time any payment or part
thereof to  Collateral  Agent with respect to any of Company's  Indebtedness  is
rescinded or must  otherwise  be restored by  Collateral  Agent  and/or  Holders
pursuant to any insolvency,  bankruptcy,  reorganization,  receivership,  or any
other debt relief  granted to Company or to any other  party.  In the event that
Collateral  Agent and/or Holders must rescind or restore any payment received by
Collateral Agent and/or Holders in satisfaction of Company's  Indebtedness,  any
prior release or discharge from the terms of this  Agreement  given to Guarantor
shall be without  effect,  and this Agreement and  Guarantor's  obligations  and
liabilities  hereunder  shall  automatically  be renewed or reinstated and shall
remain in full  force  and  effect to the same  degree  and  extent as if such a
release or discharge was never granted. It is the intention of Collateral Agent,
Holders and Guarantor that  Guarantor's  obligations and  liabilities  hereunder
shall not be discharged  except by Guarantor's full and complete  performance of
such   obligations  and  liabilities  and  then  only  to  the  extent  of  such
performance.

     SECTION  9.   Enforcement  of  Guarantor's   Obligations  and  Liabilities.
Guarantor agrees that,  should Collateral Agent and/or Holders deem it necessary
to file an appropriate collection action to enforce Guarantor's  obligations and
liabilities  under this  Agreement,  Collateral  Agent may commence such a civil
action  against  Guarantor  without the  necessity  of first (i)  attempting  to
collect Company's Indebtedness from Company or from any other guarantor,  surety
or endorser,  whether  through filing of suit or otherwise,  (ii)  attempting to
exercise against any collateral directly or indirectly securing repayment of any
of  Company's  Indebtedness,  whether  through  the  filing  of  an  appropriate
foreclosure  action  or  otherwise,  or (iii)  including  Company  or any  other
guarantor,  surety or endorser of any of Company's Indebtedness as an additional
party defendant in such a collection action against Guarantor. In the event that
Collateral  Agent should ever deem it  necessary  to refer this  Agreement to an
attorney-at-law  for  the  purpose  of  enforcing   Guarantor   obligations  and
liabilities hereunder,  or of protecting or preserving Collateral Agent's and/or
Holders'  rights  hereunder,  Guarantor (on a joint and several basis) agrees to
reimburse  Collateral  Agent and/or Holders for the  reasonable  fees of such an
attorney.  Guarantor  additionally  agrees that Collateral  Agent and/or Holders
shall not be liable for failure to use  diligence  in the  collection  of any of
Company's  Indebtedness or any collateral  security therefor,  or in creating or
preserving  the liability of any person liable on any such  Indebtedness,  or in
creating, perfecting or preserving any security for any such Indebtedness.

     SECTION 10. Additional Documents. Upon the reasonable request of Collateral
Agent,  Guarantor  will,  at any time,  and from time to time,  duly execute and
deliver to Holder any and all such further instruments and documents, and supply
such additional  information as may be reasonably  necessary or advisable in the
opinion of Collateral Agent, to obtain the full benefits of this Agreement.

     SECTION 11. Transfer of Indebtedness.  This agreement is for the benefit of
Holders and for such other  person or persons as may from time to time become or
be the  holders of any of  Company's  Indebtedness  hereby  guaranteed  and this
Agreement shall be transferable  and negotiable,  with the same force and effect
and to the same  extent as  Company's  Indebtedness  may be  transferable  under
Article  15 of the  Purchase  Agreement,  it  being  understood  that,  upon the
transfer  or  assignment  by Holders  of any of  Company's  Indebtedness


                                       6


hereby  guaranteed,  the legal holder or holders of such Indebtedness shall have
all the rights granted to Holders under this Agreement.

          Guarantor hereby  recognizes and agrees that Holders may, from time to
time, one or more times,  transfer all or any portion of Company's  Indebtedness
to one or more third parties.  Such  transfers may include,  but are not limited
to, sales of a  participation  or syndication  interest in such  Indebtedness in
favor of one or more third parties in accordance with Article 15 of the Purchase
Agreement.  Guarantor specifically agrees and consents to all such transfers and
assignments  in  accordance  with  Article  15 of  the  Purchase  Agreement  and
Guarantor  further waives any  subsequent  notice of and right to consent to any
such transfers and assignments as may be provided under applicable New York law.
Guarantor  additionally  agrees that the purchaser of a syndication  interest in
Company's  Indebtedness  will be considered as the absolute owner of an interest
in, or a  percentage  interest of, such  Indebtedness  and that such a purchaser
shall  have all of the  rights  granted  to the  purchaser  under any  agreement
governing the sale of such a syndication interest and all rights of Holders from
whom the  syndication  interest  was  purchased  under the  Purchase  Agreement.
Guarantor  further  waives any right of offset that  Guarantor  may have against
Holders and/or any purchaser of such a participation or syndication  interest in
Company's Indebtedness and Guarantor  unconditionally agrees that either Holders
or such a purchaser may enforce  Guarantor's  obligations and liabilities  under
this Agreement, irrespective of the failure or insolvency of Holders or any such
purchaser.  Guarantor further agrees that, upon any transfer, in accordance with
Article  15 of the  Purchase  Agreement,  of all or  any  portion  of  Company's
Indebtedness,  Holders may transfer and deliver any and all collateral  securing
repayment of such  Indebtedness  including,  but not limited to, any  collateral
provided  by  Guarantor)  to  the  transferee  of  such  Indebtedness  and  such
collateral  (again,  including but not limited to Guarantor's  collateral) shall
secure  any and all of  Company's  Indebtedness  in  favor  of such  transferee.
Guarantor  additionally  agrees that,  after any such transfer or assignment has
taken place in  accordance  with Article 15 of the Purchase  Agreement,  Holders
shall be fully  discharged  from any and all  liability  and  responsibility  to
Company (and  Guarantor)  with respect to such  collateral,  and the  transferee
thereafter  shall be vested with all the powers and rights with  respect to such
collateral.

     SECTION 12. Right of Offset.  As  collateral  security for the repayment of
Guarantor's  obligations and liabilities under this Agreement,  Guarantor hereby
grants  Holders,  as well as their  successors and assigns,  the right to apply,
upon the occurrence of an Event of Default under the Purchase Agreement, any and
all funds that  Guarantor may then have on deposit with or in the  possession or
control of any Holder and its successors or assigns (with the exception of funds
deposited in any IRA, pension or other tax-deferred  deposit accounts),  towards
repayment of any of Company's Indebtedness subject to this Agreement.

     SECTION 13.  Construction.  The  provisions of this  Agreement  shall be in
addition to and  cumulative of, and not in  substitution,  novation or discharge
of,  any and all  prior  or  contemporaneous  guaranty  or other  agreements  by
Guarantor,  in favor of  Collateral  Agent or  assigned to  Collateral  Agent by
others,  all of which shall be construed as  complementing  each other.  Nothing
herein contained shall prevent  Collateral Agent from enforcing any and all such
guaranties or agreements in accordance with their respective terms.

                                       7


     SECTION 14. Amendment. No amendment, modification, consent or waiver of any
provision  of this  Agreement,  and no consent  to any  departure  by  Guarantor
therefrom,  shall be effective unless the same shall be in writing signed by the
Collateral  Agent, and then shall be effective only to the specific instance and
for the specific purpose for which given.

     SECTION 15.  Successors  and Assigns  Bound.  Guarantor's  obligations  and
liabilities  under this Agreement shall be binding upon  Guarantor's  successors
and assigns.  The rights and remedies  granted to  Collateral  Agent and Holders
under this Agreement  shall also inure to the benefit of Collateral  Agent's and
Holders' (and any Holder's  Affiliate in the case of any  obligations of Company
and/or Guarantor under any Hedging Agreement) successors and assigns, as well as
to any and all  subsequent  holder or holders of any of  Company's  Indebtedness
subject to this Agreement.

     SECTION  16.  Caption  Heading.  Caption  headings  of the  section of this
Agreement are for convenience  purposes only and are not to be used to interpret
or to define  their  provisions.  In this  Agreement,  whenever  the  context so
requires,  the  singular  includes  the plural and the plural also  includes the
singular.

     SECTION 17.  Governing Law. THIS AGREEMENT  SHALL BE GOVERNED AND CONSTRUED
IN ACCORDANCE WITH THE SUBSTANTIVE LAWS OF THE STATE OF NEW YORK.

     SECTION 18. Severability.  If any provision of this Agreement is held to be
illegal,  invalid or unenforceable under present or future laws effective during
the term hereof;  such provision shall be fully severable,  this Agreement shall
be  construed  and  enforceable  as if the  illegal,  invalid  or  unenforceable
provision had never comprised a part of it, and the remaining provisions of this
Agreement shall remain in full force and effect and shall not be affected by the
illegal,  invalid  or  unenforceable  provision  or by its  severance  herefrom.
Furthermore,  in lieu of such illegal, invalid or unenforceable provision, there
shall be added automatically as a part of this Agreement, a provision as similar
in terms to such illegal,  invalid or unenforceable provision as may be possible
and legal, valid and enforceable.

     SECTION  19.  Subordination  Agreement.  Reference  is made  herein for all
purposes to that certain Subordination Agreement (the "Subordination Agreement")
dated as of October  29,  2004,  executed  among the  Collateral  Agent,  in its
capacity as collateral agent for the financial institutions and investment funds
party to the Purchase  Agreement,  Hibernia  National  Bank,  in its capacity as
agent (the "Senior  Agent") for the financial  institutions  party to the Senior
Credit Agreement and Company.  Notwithstanding  anything to the contrary herein,
until  such time as the  Senior  Indebtedness  (as such term is  defined  in the
Subordination  Agreement) is paid in full and the  commitments  evidenced by the
Senior Credit  Documents have been  terminated,  the provisions of this Guaranty
are  subject  to  the  terms,  covenants,   conditions  and  provisions  of  the
Subordination  Agreement,  which, among other things, provide that the interests
of the  Collateral  Agent  in  and to the  Collateral  shall  be  inferior,  and
subordinate   to  the  interests  of  Senior  Agent  in   accordance   with  the
Subordination Agreement. In the event of any inconsistency between the terms and
provisions  of  this  Guaranty  and  the  Subordination  Agreement,  the  terms,
covenants,  conditions  and  provisions  of the  Subordination  Agreement


                                       8


shall  prevail  until  such  time as the  Senior  Indebtedness  (as such term is
defined  in the  Subordination  Agreement)  is paid in full and the  commitments
evidenced by the Senior Credit Documents have been terminated.

THIS WRITTEN  COMMERCIAL  GUARANTY AND THE OTHER  DOCUMENTS  REPRESENT THE FINAL
AGREEMENT  BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS,  OR SUBSEQUENT  ORAL  AGREEMENTS  OF THE PARTIES.  THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

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     IN WITNESS  WHEREOF,  Guarantor has executed this Agreement in favor of the
Collateral  Agent for the ratable benefit of the Holders on the day, month,  and
year first written above.

                                            GUARANTOR:

                                            CCBM, INC.,
                                            a Delaware corporation


                                            By: /s/ PAUL F. BOLING
                                                -------------------------
                                            Name: Paul F. Boling
                                            Title: Vice President and
                                                   Chief Financial Officer



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