Document:

CONSENT TO SUBLEASE

     THIS  CONSENT  TO  SUBLEASE ("Consent Agreement") is executed effective the
1st day of April, 2005 by and among Harsch Investment Properties, LLC, an Oregon
limited  liability company, ("Landlord"), Gateway, Inc., a Delaware corporation,
("Tenant"),  and  SpaceDev,  Inc.,  a  Colorado  corporation,  ("Subtenant").

     Landlord  and  Tenant are parties to that certain Lease dated May 14, 2001,
as  amended  (the  "Lease").  Landlord acquired the business park containing the
Premises  and  was assigned the Landlord's interest under the Lease, as amended,
effective  November  9, 2001.  Tenant desires to sublet all (11,069 square feet)
of  the  Premises  covered  by  the  Lease  to Subtenant, pursuant to a separate
sublease  (the "Sublease").  Under the Lease, such a Sublease requires the prior
written  consent  of Landlord, which consent shall not be unreasonably withheld,
conditioned  or  delayed.  Landlord  is  willing  to  grant such consent, on the
following  terms  and  conditions.

     1.     Sublease.  Tenant  and  Subtenant  warrant  that  a true copy of the
Sublease  is  attached  hereto as Exhibit "A."  Tenant and Subtenant covenant to
deliver  to  Landlord  upon  execution  any  subsequent  amendment  or  addendum
regarding  the  Sublease.

     2. Consent. Landlord hereby consents to the Sublease on the terms set forth
in  this  Consent Agreement. The consent granted herein is a consent only to the
act  of  subletting; it is not a consent, agreement, or approval of or to any of
the  terms and provisions of the Sublease nor is it a representation by Landlord
that  any  warranties  made  in connection with or as a part of the Sublease are
accurate.  This  Consent Agreement is not a waiver of any default by Tenant, nor
of  any  right  of  Landlord.  Regardless  of  the  terms  and provisions of the
Sublease,  Landlord  shall continue to be entitled to full performance of all of
the  terms  of  the  Lease, even if the Sublease may specify different or lesser
performance  than  does  the  Lease.

     3.  Other  Consents. Landlord retains all rights under the Lease, including
all  rights  with  respect  to  any  other or future sublease or assignment, any
alterations, any changes of use, and any other matter. This Consent Agreement is
not  a  consent  to any future assignment or sublease and is not a waiver of the
requirement  to  seek  and  to  obtain  consent  for  the  same.

     4.     Lease  Obligations.  Subtenant  hereby  agrees to be bound by and to
perform all of the obligations of the Tenant under the Lease .  Without limiting
the  generality  of  the  foregoing,  (a)  Subtenant  shall indemnify and defend
Landlord on the same terms as Tenant is required to do so by the Lease,  and (b)
Subtenant  hereby  waives  and  releases  all  claims  against   Landlord,   and
acknowledges  that the liability of Landlord to Subtenant is limited, all on the
same  basis as Tenant has done so pursuant to the terms of the Lease.  Subtenant
is  not,  however,  granted  any  right  to  enforce the Lease against Landlord.

     5.     Continued  Liability.  Nothing  herein shall be deemed a waiver or a
release  of any obligation or liability of Tenant under the Lease.  Tenant shall
remain  fully  liable and responsible under the Lease.  No consent, amendment or
indulgence  attributable to Landlord with respect to the Lease or Sublease shall
release  Tenant  from  any  such  liability  or  obligation.

                                      PAGE

     6. Attribution. Any act or omission attributable to Subtenant shall also be
attributable  to Tenant such that, if such act or omission had been committed by
Tenant and would constitute a default under the Lease, the same shall constitute
a  default  under  the  Lease.

     7.  Changes.  This  Consent Agreement is not a consent to any alteration of
the  Premises  or  change  in  use  of  the  Premises.

     8.  Lease Termination. The Sublease is and shall be subject and subordinate
to  the  Lease. In the event Landlord terminates the Lease and/or Tenant's right
of  possession  of the Premises pursuant to the Lease, or in the event the Lease
otherwise terminates, such event shall not be deemed (by merger or otherwise) to
be  a  transfer of the Sublease to Landlord. Rather, in such event, the Sublease
shall  be  deemed  to  be terminated by Tenant and Subtenant; provided, however,
Landlord  shall have the right, in its discretion, to elect that such event does
constitute  an  assignment  to  Landlord  of  the Sublease. In the event of such
assignment,  Subtenant  shall  tender  all  performance  under  the  Sublease to
Landlord  and  Landlord  shall  have  all  rights  as lessor under the Sublease,
provided,  (a)  Landlord  shall  not  be  bound by any amendment of or waiver of
lessor rights under the Sublease, (b) Landlord shall not credit Subtenant nor be
liable  to  Subtenant  for  any security deposit, prepaid rent, or other prepaid
amount  which  shall  have  been  deposited  with  or prepaid to Tenant, and (c)
Landlord  shall not be liable for nor obligated to cure or remedy any default or
failure  on  the  part  of  Tenant  under  the  Sublease.

     9. Notices. Landlord assumes no obligation to send any notice to Subtenant.
In the event Landlord desires to send any notice to Subtenant, such notice shall
be  given  and  deemed  received  as  set  forth in Section 27 of the Lease. The
address  to  be  used for Subtenant is Spacedev, Inc., 13855 Stowe Drive, Poway,
California,  92064,  attention  Richard  B.  Slansky.

     10.  Insurance.  Upon execution hereof, Subtenant shall deliver to Landlord
certificates  evidencing  insurance  as  described  in  Section 11 of the Lease.

     11.  Performance.  Landlord  shall  have no obligation to accept payment or
performance  of  any  obligation  of  Tenant  from  Subtenant. Acceptance of any
payment  or  performance by Landlord from Subtenant shall not constitute consent
to  any  assignment  to  Subtenant  nor  vest  in Subtenant any other or further
rights.

     12.  Confirmation.  By execution below, Tenant agrees and acknowledges that
to the best of Tenant's knowledge, Landlord has performed all of its obligations
under  the  Lease  to  date,  including,  but  not limited to, those obligations
related  to  this  Consent  Agreement.

     13.  Security Deposit. All rights with respect to any security deposit paid
by Tenant to Landlord shall be determined exclusively pursuant to the Lease, and
Subtenant  shall  have  no  right  to  such  security  deposit.

     14.  Default.  All  obligations  of  Tenant  and  Subtenant  hereunder  are
covenants  in  favor  of Landlord. Without limiting any other right or remedy of
Landlord,  any failure by Tenant or Subtenant to perform any such covenant shall
be  deemed  to be a failure by Tenant to perform a material obligation under the
Lease.

                                      PAGE

     15.  Conditions  Precedent.  This Consent Agreement shall be effective only
when (a) the same shall have been executed and delivered by all parties, (b) the
required insurance certificate(s) shall have been delivered to Landlord, (c) the
Sublease  shall  have been fully executed and delivered and evidence of the same
shall  have  been delivered to Landlord, and (d) the sum of $1,000.00 shall have
been  paid  to Landlord. If these conditions are not met by April 30, 2005, this
Consent  Agreement  shall  be  void.

          IN  WITNESS WHEREOF, this Consent Agreement is executed as of the date
     and  year  first  above  written.

                                      LANDLORD:
                                      ------------------------------------------
                                      By:  /s/ William H. Rodewald
                                      Its:  Vice President
                                      On:  April 14, 2005

                                      TENANT:  Gateway, Inc
                                      ------------------------------------------
                                      By:  /s/  G.W. Jaquess
                                      Its:  Sr. Director

                                      SUBTENANT:  SpaceDev, Inc
                                      ------------------------------------------
                                      By:  /s/ Richard B. Slansky
                                      Its:  President

Exhibits
--------

A  -  Sublease

                                      PAGE<PAGE>

                                                                     EXHIBIT 4.1

                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

      This First Amendment to Second Amended and Restated Credit Agreement (this
"FIRST AMENDMENT"), dated as of April 11, 2005, is by and among WHITING OIL AND
GAS CORPORATION, a Delaware corporation ("BORROWER"), WHITING PETROLEUM
CORPORATION, a Delaware corporation ("WPC"), JPMORGAN CHASE BANK, N.A.,
successor by merger to Bank One, NA (Main Office Chicago), a national banking
association, as Administrative Agent ("ADMINISTRATIVE AGENT"), and each of the
financial institutions a party hereto as Banks (hereinafter collectively
referred to as "EXECUTING BANKS," and individually, an "EXECUTING BANK").

                                   WITNESSETH:

      WHEREAS, Borrower, WPC, Administrative Agent and Banks are parties to that
certain Second Amended and Restated Credit Agreement dated as of September 23,
2004 (the "CREDIT AGREEMENT") (unless otherwise defined herein, all terms used
herein with their initial letter capitalized shall have the meaning given such
terms in the Credit Agreement, as amended hereby); and

      WHEREAS, Borrower and WPC have requested that the Credit Agreement be
amended in certain respects; and

      WHEREAS, subject to and upon the terms and conditions set forth herein,
Executing Banks have agreed to Borrower's and WPC's request.

      NOW THEREFORE, for and in consideration of the mutual covenants and
agreements herein contained and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged and confessed,
Borrower, WPC, Administrative Agent and each Executing Bank hereby agree as
follows:

      SECTION 1. AMENDMENTS. In reliance on the representations, warranties,
covenants and agreements contained in this First Amendment, and subject to the
satisfaction of each condition precedent set forth in Section 2 hereof, the
Credit Agreement is hereby amended effective as of the date hereof in the manner
provided in this Section 1.

      1.1. AMENDMENT TO DEFINITIONS. The definitions of "ADMINISTRATIVE AGENT,"
"BANK ONE," "LOAN PAPERS," "PERMITTED WPC SUBORDINATE DEBT" and "PERMITTED WPC
SUBORDINATE DEBT DOCUMENTS" contained in Section 2.1 of the Credit Agreement
shall be amended to read in full as follows:

            "ADMINISTRATIVE AGENT" means JPMorgan Chase Bank, N.A., successor by
      merger to Bank One, NA (Main Office Chicago), a national banking
      association, in its capacity as Administrative Agent for Banks hereunder
      or any successor thereto.

                                       1

<PAGE>

            "BANK ONE" means JPMorgan Chase Bank, N.A., successor by merger to
      Bank One, NA (Main Office Chicago), a national banking association, in its
      capacity as a Bank.

            "LOAN PAPERS" means this Agreement, the First Amendment, the Notes,
      each Facility Guaranty which may now or hereafter be executed, each Pledge
      Agreement which may now or hereafter be executed, all Mortgages now or at
      any time hereafter delivered pursuant to Section 6.1, the Amendments to
      Mortgages, all Letters of Credit, and all other certificates, documents or
      instruments delivered in connection with this Agreement, as the foregoing
      may be amended from time to time.

            "PERMITTED WPC SUBORDINATE DEBT" means, collectively, the Permitted
      2004 WPC Subordinate Debt and the Permitted 2005 WPC Subordinate Debt.

            "PERMITTED WPC SUBORDINATE DEBT DOCUMENTS" means, collectively, the
      Permitted 2004 WPC Subordinate Debt Documents and the Permitted 2005
      Subordinate Debt Documents.

      1.2. ADDITIONAL DEFINITIONS. Section 2.1 of the Credit Agreement shall be
amended to add the following definitions to such Section:

            "FIRST AMENDMENT" means that certain First Amendment to Second
      Amended and Restated Credit Agreement dated as of April 11, 2005, among
      Borrower, WPC, Administrative Agent and Banks party thereto.

            "OFFERING MATERIALS" has the meaning set forth in the First
      Amendment.

            "PERMITTED 2004 WPC SUBORDINATE DEBT" means unsecured Debt of WPC
      evidenced by WPC's 7 1/4% Senior Subordinated Notes Due 2012 issued
      pursuant to the Indenture in an aggregate outstanding principal amount at
      any time of not greater than $150,000,000.

            "PERMITTED 2004 WPC SUBORDINATE DEBT DOCUMENTS" means, collectively,
      the Indenture, the "Notes" (as defined in the Indenture), and all other
      indentures, purchase agreements, promissory notes, Guarantees or other
      documents or instruments issued or given in connection with, evidencing
      and/or otherwise pertaining to, the Permitted 2004 WPC Subordinate Debt.

            "PERMITTED 2005 WPC SUBORDINATE DEBT" means unsecured Debt of WPC
      resulting from the issuance of WPC's senior unsecured subordinated notes
      in an aggregate outstanding principal balance at any time of not greater
      than $220,000,000, and which (a) has a coupon rate of not greater than
      seven and one-half percent (7.5%), (b) has a due date not earlier than
      2013, (c) is fully subordinated to the Obligations pursuant to
      subordination provisions that are substantially similar to those governing
      the Permitted 2004 WPC Subordinate Debt, and not materially less favorable
      to Banks than those set forth and described in the Offering Materials, and
      (d) is not subject to negative covenants or events of default (or other
      provisions which have the same effect as negative covenants or events of
      default) which are materially more restrictive on WPC than those contained

                                       2

<PAGE>

      in the Permitted 2004 WPC Subordinate Debt Documents and related to the
      Permitted 2004 WPC Subordinate Debt, or in the Offering Materials.

            "PERMITTED 2005 WPC SUBORDINATE DEBT DOCUMENTS" means, collectively,
      all indentures, promissory notes, Guarantees or other documents or
      instruments issued or given in connection with, evidencing and/or
      otherwise pertaining to, the Permitted 2005 WPC Subordinate Debt.

      1.3. AMENDMENT TO GENERAL PROVISIONS AS TO PAYMENTS. The "seventh" clause
of Section 4.2(c) of the Credit Agreement shall be amended and restated to read
in full as follows:

            "seventh, to the payment to each Bank (and/or its Affiliates) of its
      Commitment Percentage of the outstanding principal of the Revolving Loan
      and to satisfy all obligations and liabilities then due under Hedge
      Agreements, such payments to be made pro rata to each Bank (and/or its
      Affiliates) owed such Obligations in proportion to all such payments owed
      to all Banks (and/or its Affiliates) in respect of such Obligations,".

      1.4. AMENDMENT TO INFORMATION COVENANT. Section 9.1 of the Credit
Agreement shall be amended to (a) delete the "and" at the end of clause (k)
thereof, (b) delete the period at the end of clause (l) thereof, and to insert
in lieu of such period a semi-colon (";"), and (c) add thereto a new clause (m)
which shall read in full as follows:

            "(m) promptly upon the closing and consummation of the issuance of
      the Permitted 2005 WPC Subordinate Debt, a true and correct copy of each
      material document, instrument and agreement evidencing or otherwise
      pertaining to the Permitted 2005 WPC Subordinate Debt."

      SECTION 2. CONDITIONS PRECEDENT. The effectiveness of the amendments to
the Credit Agreement contained in Section 1 hereof is subject to the
satisfaction of each condition precedent set forth in this Section 2:

      2.1. PERMITTED 2005 WPC SUBORDINATE DEBT. Administrative Agent shall have
received a true and correct copy of the final prospectus supplement and other
material documents, instruments and agreements (collectively, the "OFFERING
MATERIALS") evidencing the terms and conditions of the Permitted 2005 WPC
Subordinate Debt, together with a certificate from an Authorized Officer of WPC
certifying that the Offering Materials are accurate and complete and represent
the definitive terms and conditions of the Permitted 2005 WPC Subordinate Debt,
which such Offering Materials shall not, except to the extent reviewed and
approved by Required Banks (in their reasonable discretion), deviate in any
material respect (other than the insertion of maturity and pricing terms that do
not conflict with the definition of Permitted 2005 WPC Subordinate Debt as set
forth in this First Amendment) from the preliminary prospectus supplement
delivered to Administrative Agent prior to the date of this First Amendment.

      2.2. NO DEFAULTS. Prior to and after giving effect to the amendments
contained in Section 1 hereof, no Default or Event of Default shall exist.

                                       3

<PAGE>

      2.3. FEES AND EXPENSES. Borrower shall have paid all reasonable fees and
expenses incurred by Administrative Agent in connection with the preparation,
negotiation and execution of this First Amendment, including, without
limitation, all reasonable fees and expenses of Vinson & Elkins L.L.P., counsel
to Administrative Agent.

      2.4. OTHER DOCUMENTATION. Administrative Agent shall have received such
other documents, instruments and agreements as it or any Bank may reasonably
request, all in form and substance reasonably satisfactory to Administrative
Agent and Banks.

      SECTION 3. ADDITIONAL AGREEMENT. Borrower hereby covenants and agrees that
upon the consummation, closing and issuance of the Permitted 2005 WPC
Subordinate Debt, Borrower shall (or shall cause WPC to) deliver to
Administrative Agent fully executed and complete copies of all material
agreements and other documents executed in connection with, and/or otherwise
evidencing, the Permitted 2005 WPC Subordinate Debt, accompanied by a
certificate executed by an Authorized Officer of Borrower certifying that such
copies are accurate and complete and represent the complete understanding and
agreement of the parties thereto. Any material variation in the terms of such
agreements and documents described in this Section 3 from the terms set forth in
the preliminary prospectus supplement referenced in Section 2.1 above shall be
in form and substance reasonably satisfactory to Required Banks.

      SECTION 4. REPRESENTATIONS AND WARRANTIES OF BORROWER. To induce Executing
Banks and Administrative Agent to enter into this First Amendment, Borrower and
WPC hereby jointly and severally represent and warrant to Executing Banks and
Administrative Agent as follows:

      4.1. DUE AUTHORIZATION; NO CONFLICT. The execution, delivery and
performance by Borrower and WPC of this First Amendment are within Borrower's
and WPC's corporate powers, have been duly authorized by all necessary action,
require no action by or in respect of, or filing with, any governmental body,
agency or official and do not violate or constitute a default under any
provision of applicable law or any Material Agreement binding upon Borrower or
WPC or result in the creation or imposition of any Lien upon any of the assets
of Borrower or WPC except Permitted Encumbrances.

      4.2. VALIDITY AND ENFORCEABILITY. This First Amendment constitutes the
valid and binding obligation of Borrower and WPC enforceable in accordance with
its terms, except as (i) the enforceability thereof may be limited by
bankruptcy, insolvency or similar laws affecting creditor's rights generally,
and (ii) the availability of equitable remedies may be limited by equitable
principles of general application.

      4.3. ACCURACY OF REPRESENTATIONS AND WARRANTIES. Each representation and
warranty of each Credit Party contained in the Loan Papers is true and correct
in all material respects as of the date hereof (except to the extent such
representations and warranties are expressly made as of a particular date, in
which event such representations and warranties were true and correct as of such
date).

      4.4. ABSENCE OF DEFAULTS. Prior to and after giving effect to the
amendments contained in Section 1 hereof, no Default or Event of Default has
occurred which is continuing.

                                       4

<PAGE>

      4.5. NO DEFENSE. Neither Borrower nor WPC has any defense to payment of,
or any counterclaim or rights of set-off with respect to, all or any portion of
the Obligations.

      SECTION 5. MISCELLANEOUS.

      5.1. REAFFIRMATION OF LOAN PAPERS. Any and all of the terms and provisions
of the Credit Agreement and the Loan Papers shall, except as amended and
modified hereby, remain in full force and effect, and are hereby ratified and
confirmed. The amendments contemplated hereby shall not limit or impair any
Liens securing the Obligations, each of which are hereby ratified, affirmed and
extended to secure the Obligations.

      5.2. CONFIRMATION OF LOAN PAPERS AND LIENS. As a material inducement to
Executing Banks to make the agreements and grant the amendments set forth
herein, Borrower and WPC hereby (a) acknowledge and confirm the continuing
existence, validity and effectiveness of the Loan Papers and the Liens granted
thereunder, (b) agree that the execution, delivery and performance of this First
Amendment and the consummation of the transaction contemplated hereby shall not
in any way release, diminish, impair, reduce or otherwise adversely affect such
Loan Papers and Liens, and (c) acknowledge and agree that the Liens granted
under the Loan Papers secure, and after the consummation of the transactions
contemplated hereby will continue to secure, the payment and performance of the
Obligations as first priority perfected Liens.

      5.3. PARTIES IN INTEREST. All of the terms and provisions of this First
Amendment shall bind and inure to the benefit of the parties hereto and their
respective successors and assigns.

      5.4. LEGAL EXPENSES. Borrower and WPC hereby jointly and severally agree
to pay on demand all reasonable fees and expenses of counsel to Administrative
Agent incurred by Administrative Agent in connection with the preparation,
negotiation and execution of this First Amendment.

      5.5. COUNTERPARTS. This First Amendment may be executed in counterparts,
and all parties need not execute the same counterpart; however, no party shall
be bound by this First Amendment until Borrower, WPC and Required Banks have
executed a counterpart. Facsimiles shall be effective as originals.

      5.6. COMPLETE AGREEMENT. THIS FIRST AMENDMENT, THE CREDIT AGREEMENT AND
THE OTHER LOAN PAPERS REPRESENT THE FINAL AGREEMENT AMONG THE PARTIES AND MAY
NOT BE CONTRADICTED BY EVIDENCE OF PRIOR, CONTEMPORANEOUS OR ORAL AGREEMENTS OF
THE PARTIES. THERE ARE NO UNWRITTEN ORAL AGREEMENTS BETWEEN OR AMONG THE
PARTIES.

      5.7. HEADINGS. The headings, captions and arrangements used in this First
Amendment are, unless specified otherwise, for convenience only and shall not be
deemed to limit, amplify or modify the terms of this First Amendment, nor affect
the meaning thereof.

      5.8. EFFECTIVENESS. This First Amendment shall be effective automatically
and without necessity of any further action by Borrower, WPC, Administrative
Agent or Banks when

                                       5

<PAGE>

counterparts hereof have been executed by Borrower, WPC, Administrative Agent
and Required Banks, and all conditions to the effectiveness hereof set forth
herein have been satisfied (including, without limitation, all conditions
precedent set forth in Section 2 hereof).

      IN WITNESS WHEREOF, the parties hereto have caused this First Amendment to
be duly executed by their respective Authorized Officers on the date and year
first above written.

                           [Signature pages to follow]

                                       6

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                             BORROWER:

                             WHITING OIL AND GAS CORPORATION, a
                             Delaware corporation

                             By: /s/ James J. Volker
                                 -------------------------------------
                                     James J. Volker,
                                     President and Chief Executive Officer

                             WPC:

                             WHITING PETROLEUM CORPORATION, a
                             Delaware corporation

                             By: /s/ James J. Volker
                                 -------------------------------------
                                     James J. Volker,
                                     President and Chief Executive Officer

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                ADMINISTRATIVE AGENT:

                                JPMORGAN CHASE BANK, N.A., successor by
                                merger to Bank One, NA (Main Office Chicago), as
                                Administrative Agent

                                /s/ J. Scott Fowler
                                ---------------------------------------------
                                       J. Scott Fowler,
                                       Vice President

                                BANKS:

                                JPMORGAN CHASE BANK, N.A., successor by
                                merger to Bank One, NA (Main Office Chicago)

                                /s/ J. Scott Fowler
                                ---------------------------------------------
                                       J. Scott Fowler,
                                       Vice President

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                       WACHOVIA BANK, NATIONAL ASSOCIATION

                                       By: /s/ Philip Trinder
                                           -------------------------------------
                                       Name: Philip Trinder
                                       Title: Vice President

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               FLEET NATIONAL BANK

                                               By: _____________________________
                                               Name: ___________________________
                                               Title: __________________________

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               U.S. BANK NATIONAL ASSOCIATION

                                               By: _____________________________
                                               Name: ___________________________
                                               Title: __________________________

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               UNION BANK OF CALIFORNIA, N.A.

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

                                               By: /s/ Sean Murphy
                                                   -----------------------------
                                               Name: Sean Murphy
                                               Title: Vice President

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               FORTIS CAPITAL CORP.

                                               By: _____________________________
                                               Name: ___________________________
                                               Title: __________________________

                                               By: _____________________________
                                               Name: ___________________________
                                               Title: __________________________

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               BANK OF SCOTLAND

                                               By: _____________________________
                                               Name: ___________________________
                                               Title: __________________________

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               COMERICA BANK

                                               By: /s/ Peter L. Sefzik
                                                   -----------------------------
                                               Name: Peter L. Sefzik
                                               Title: Vice President

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               WELLS FARGO BANK, N.A.

                                               By: /s/ Laura Bumgarner
                                                   -----------------------------
                                               Name: Laura Bumgarner
                                               Title: Relationship Manager, AVP

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               COMPASS BANK

                                               By:______________________________
                                               Name: ___________________________
                                               Title: __________________________

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               BANK OF OKLAHOMA, N.A.

                                               By: _____________________________
                                               Name: ___________________________
                                               Title: __________________________

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               NATEXIS BANQUES POPULAIRES

                                               By: /s/ Donovan C. Broussard
                                                   -----------------------------
                                               Name: Donovan C. Broussard
                                               Title: Vice President & Manager

                                               By: /s/ Daniel Payer
                                                   -----------------------------
                                               Name: Daniel Payer
                                               Title: Vice President

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               KEYBANK NATIONAL ASSOCIATION

                                               By: /s/ Thomas Rajan
                                                   -----------------------------
                                               Name: Thomas Rajan
                                               Title: Vice President

                                [Signature Page]

<PAGE>

                                SIGNATURE PAGE TO
                               FIRST AMENDMENT TO
                  SECOND AMENDED AND RESTATED CREDIT AGREEMENT

                                               HIBERNIA NATIONAL BANK

                                               By: /s/ Daria Mahoney
                                                   -----------------------------
                                               Name: Daria Mahoney
                                               Title: Vice President

                                [Signature Page]

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