Document:

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         EXHIBIT 10.42

         Amendment to Employment Agreement dated August 1, 1993 between Stephen
         Adams and the Company.

                   [TYPED ON AFFINITY GROUP, INC. LETTERHEAD]

                                September 1, 1999

         Stephen Adams
         Affinity Group, Inc.
         2575 Vista Del Mar Drive
         Ventura, CA 93001

         RE: EMPLOYMENT AGREEMENT DATED AS OF AUGUST 1, 1993 BETWEEN AFFINITY
         GROUP, INC. (THE "COMPANY") AND STEPHEN ADAMS, AS AMENDED (THE
         "EMPLOYMENT AGREEMENT")

         Dear Steve:

                  The term of the Employment Agreement continues until September
         1, 1999. The Company desires to continue your employment in accordance
         with the terms of the Employment Agreement and you have acknowledged
         that you are willing to continue such employment. Therefore, the terms
         of the Employment Agreement shall be extended for an additional one (1)
         year period beginning on the date hereof and continuing until September
         1, 2000.

                  If the foregoing properly sets forth our understanding, I
         would appreciate your so acknowledging by executing the counterpart of
         this letter in the space provided below.

                                                   AFFINITY GROUP, INC.

                                                   By:      /s/
                                                       ----------------------
                                                  Its: President

         Accepted and agreed to as of the 1st day of September, 1999.

              /s/
         ---------------------
         Stephen Adams

                                         70<PAGE>

                                                                   EXHIBIT 10.23

                                                                  EXECUTION COPY

                                                   |__| Employee's Copy
                                                   |__| Company's Copy

                         LUMINANT WORLDWIDE CORPORATION
                              EMPLOYMENT AGREEMENT

To K. David Quackenbush:

This Agreement establishes the terms of your employment with Luminant Worldwide
Corporation, a Delaware corporation (the "COMPANY"). Your employment under this
Agreement is contingent on effectiveness of the registration of the Company's
common stock with the Securities and Exchange Commission for the Company's
initial public offering ("IPO"). If the registration does not become effective
by December 31, 1999, this Agreement will not bind either you or the Company,
unless both you and the Company agree otherwise in writing. The Company has been
formed as a parent company to acquire a number of companies engaged in the
business of providing internet professional services and to make a public
offering of the Company's common stock.

EMPLOYMENT AND DUTIES

You and the Company agree to your employment on the terms contained herein. In
such position, you will report directly to the Company's Chief Executive Officer
or his delegate (your "DIRECT REPORT"). (The Company's Board of Directors (the
"BOARD") or the Company's Chief Executive Officer may change your Direct Report
from time to time in its or his discretion.) You agree to perform whatever
duties the Board or your Direct Report may assign you from time to time that are
reasonably consistent with your position as a senior executive. During your
employment, you agree to devote your full business time, attention, and energies
to performing those duties (except as your Direct Report otherwise agrees from
time to time). You agree to comply with the noncompetition, secrecy, and other
provisions of Exhibit A to this Agreement.

TERM OF EMPLOYMENT

Your employment under this Agreement begins as of the effective date of
registration for the IPO (the "EFFECTIVE DATE"). Unless sooner terminated under
this Agreement, your employment ends at 6:00 p.m. Central Time on the third
anniversary of the Effective Date.

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The period running from the Effective Date to the applicable date in the
preceding sentence is the "TERM."

Termination or expiration of this Agreement ends your employment but does not
end your obligation to comply with Exhibit A or the Company's obligation, if
any, to make payments under the PAYMENTS ON TERMINATION and SEVERANCE provisions
as specified below.

COMPENSATION

     SALARY

The Company will pay you an annual salary (the "SALARY") from the Effective Date
at the rate of not less than $165,000 in accordance with its generally
applicable payroll practices. The Board or your Direct Report will review your
Salary annually and consider you for increases.

     BONUS

The Board or its Compensation Committee, or if the Board directs, your Direct
Report will establish annual bonus targets under which you will be eligible for
an annual bonus equal to up to 40% of your Salary. It is the Company's good
faith intention to establish bonus targets for the first year, in consultation
with you, within 90 days following the Effective Date.

     OPTIONS

You will be eligible to receive options under the Company's 1999 Equity
Incentive Plan that will, to the extent possible, qualify as incentive stock
options under the Internal Revenue Code.

     EMPLOYEE BENEFITS

While the Company employs you under this Agreement, the Company will provide you
with the same benefits as it makes generally available from time to time to the
Company's senior executive employees, as those benefits are amended or
terminated from time to time, including participation in vacation policies (and
payment for accrued vacation) on a basis comparable to that for senior
executives. Your participation in the Company's benefit plans will be subject to
the terms of the applicable plan documents and the Company's generally applied
policies, and the Company in

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its sole discretion may from time to time adopt, modify, interpret, or
discontinue such plans or policies.

     COMPENSATION REVIEW

You will be eligible under a senior executive compensation program that will
consider you for annual increases in Salary and that will periodically review
your progress in light of targets and goals.

PLACE OF EMPLOYMENT

Your principal place of employment will be at the office at which you were
employed by a predecessor company on December 31, 1998 (or, if later, on your
starting date with the predecessor) or such other offices as the Company may
establish from time to time and to which it assigns you in its sole discretion,
provided that you will not be required to relocate outside of Harris County,
Texas and surrounding counties. You understand and agree that you must travel
from time to time for business reasons.

EXPENSES

The Company will reimburse you for reasonable and necessary travel and other
business-related expenses you incur for the Company in performing your duties
under this Agreement (with the travel accommodations substantially comparable to
that of senior executives of the Company). You must itemize and substantiate all
requests for reimbursements. You must submit requests for reimbursement in
accordance with the policies and practices of the Company.

NO OTHER EMPLOYMENT

While the Company employs you, you agree that you will not, directly or
indirectly, provide services to any person or organization for which you receive
compensation or otherwise engage in activities that would conflict or interfere
significantly with your faithful performance of your duties as an employee
without the Board's prior written consent. (This prohibition excludes any work
performed at the Company's direction.) You may manage your personal investments,
as long as the management takes only minimal amounts of time and is consistent
with the provisions of the NO CONFLICTS OF INTEREST Section and the NO
COMPETITION Section in Exhibit A.

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You represent to the Company that you are not subject to any agreement,
commitment, or policy of any third party that would prevent you from entering
into or performing your duties under this Agreement, and you agree that you will
not enter into any agreement or commitment or agree to any policy that would
prevent or hinder your performance of duties and obligations under this
Agreement, including Exhibit A.

NO CONFLICTS OF INTEREST

You confirm that you have fully disclosed to the Company, to the best of your
knowledge, all circumstances under which you, your spouse, and other persons who
reside in your household have or may have a conflict of interest with the
Company. You further agree to fully disclose to the Company any such
circumstances that might arise during your employment upon your becoming aware
of such circumstances. You agree to fully comply with the Company's policy and
practices relating to conflicts of interest.

NO IMPROPER PAYMENTS

You will neither pay nor permit payment of any remuneration to or on behalf of
any governmental official other than payments required or permitted by
applicable law. You will comply fully with the Foreign Corrupt Practices Act of
1977, as amended. You will not, directly or indirectly,

     make or permit any contribution, gift, bribe, rebate, payoff, influence
     payment, kickback, or other payment to any person or entity, private or
     public, regardless of what form, whether in money, property, or services

          to obtain favorable treatment for business secured,

          to pay for favorable treatment for business secured,

          to obtain special concessions or for special concessions already
          obtained, or

          in violation of any legal requirement, or

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          establish or maintain any fund or asset related to the Company that is
          not recorded in the Company's books and records, or

          take any action that would violate (or would be part of a series of
          actions that would violate) any U.S. law relating to international
          trade or commerce, including those laws relating to trading with the
          enemy, export control, and boycotts of Israel or Israeli products (as
          is sought by certain Arab countries).

TERMINATION

Subject to the provisions of this section, you and the Company agree that it may
terminate your employment, or you may resign, except that, if you voluntarily
resign, you must provide the Company with 90 days' prior written notice (unless
the Board or your Direct Report has previously waived such notice in writing or
authorized a shorter notice period).

     FOR CAUSE

     The Company may terminate your employment for "CAUSE" if you:

          (i) commit a material breach of your obligations or agreements under
          this Agreement, including Exhibit A;

          (ii) commit an act of gross negligence with respect to the Company or
          otherwise act with willful disregard for the Company's best interests;

          (iii) fail or refuse to perform any duties delegated to you that are
          consistent with the duties of similarly-situated senior executive or
          are otherwise required under this Agreement;

          (iv) seize a corporate opportunity for yourself instead of offering
          such opportunity to the Company if within the scope of the Company's
          or its subsidiaries' business; or

          (v) are convicted of or plead guilty or no contest to a felony (or to
          a felony charge reduced to misdemeanor), or,

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          with respect to your employment, to any misdemeanor (other than a
          traffic violation) or, with respect to your employment, commit either
          a material dishonest act or common law fraud or knowingly violate any
          federal or state securities or tax laws.

Your termination for Cause will be effective immediately upon the Company's
mailing or written transmission of notice of such termination. Before
terminating your employment for Cause under clauses (i) - (iv) above, the
Company will specify in writing to you the nature of the act, omission, refusal,
or failure that it deems to constitute Cause and, unless the Board or your
Direct Report reasonably concludes the situation could not be corrected, give
you 30 days after you receive such notice to correct the situation (and thus
avoid termination for Cause), unless the Company agrees to extend the time for
correction. You agree that the Board or your Direct Report will have the
discretion to determine in good faith whether your correction is sufficient,
provided that this decision does not foreclose you from using the Dispute
Resolution provisions of Exhibit B.

     WITHOUT CAUSE

Subject to the provisions below under PAYMENTS ON TERMINATION and SEVERANCE, the
Company may terminate your employment under this Agreement before the end of the
Term without CAUSE. The Company agrees not to terminate your employment without
CAUSE during the first six months after the Effective Date.

     DISABILITY

If you become "DISABLED" (as defined below), the Company may terminate your
employment. You are "disabled" if you are unable, despite whatever reasonable
accommodations the law requires, to render services to the Company for more than
90 consecutive days because of physical or mental disability, incapacity, or
illness. You are also disabled if you are found to be disabled within the
meaning of the Company's long-term disability insurance coverage as then in
effect (or would be so found if you applied for the coverage).

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     GOOD REASON

You may resign for Good Reason with 45 days' advance written notice. "GOOD
REASON" for this purposes means, without your consent, (i) the Company
materially breaches this Agreement or (ii) the Company relocates your primary
office outside of Harris, County, Texas and the surrounding counties.

You must give notice to the Company of your intention to resign for Good Reason
within 30 days after the occurrence of the event that you assert entitles you to
resign for Good Reason. In that notice, you must state the condition that you
consider provides you with Good Reason and, if such reason relates to clause (i)
above, must give the Company an opportunity to cure the condition within 30 days
after your notice. Before or during the 30 day period, either party may request
mediation under Exhibit B to resolve any such disputes, and, if so requested,
the parties agree to cooperate to arrange a prompt mediation during no more than
a 30 day period. If the Company fails to cure the condition, your resignation
will be effective on the 45th day after your notice (unless the Board has
previously waived such notice period in writing or agreed to a shorter notice
period or unless mediation is proceeding in good faith), in which case such
resignation will become effective 15 days after the end of such mediation, if
not previously cured.

You will not be treated as resigning for GOOD REASON if the Company already had
given notice of termination for CAUSE as of the date of your notice of
resignation.

     DEATH

If you die during the Term, the Term will end as of the date of your death.

     PAYMENTS ON TERMINATION

If you resign or the Company terminates your employment with or without Cause or
because of disability or death, the Company will pay you any unpaid portion of
your Salary pro-rated through the date of actual termination (and any annual
bonuses already determined by such date but not yet paid unless your employment
is terminated with CAUSE), reimburse any substantiated but unreimbursed business
expenses, pay any accrued and unused

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vacation time (to the extent consistent with the Company's policies), and
provide such other benefits as applicable laws or the terms of the benefits
require. Except to the extent the law requires otherwise or as provided in the
SEVERANCE paragraph, neither you nor your beneficiary or estate will have any
rights or claims under this Agreement or otherwise to receive severance or any
other compensation, or to participate in any other plan, arrangement, or
benefit, after such termination or resignation. If your employment never begins
because the Company does not complete its IPO, you acknowledge that you have no
rights to the Severance set forth below or to any other payments under or with
respect to this Agreement.

     SEVERANCE

In addition to the foregoing payments, if before the end of the Term, the
Company terminates your employment without CAUSE or you resign for GOOD REASON,
the Company will

          pay you severance equal to your Salary, as then in effect, for 18
          months on the same schedule as though you had remained employed during
          such period, even though you are no longer employed;

          pay the after-tax premium cost for you to receive any group health
          coverage the Company must offer you under Section 4980B of the
          Internal Revenue Code of 1986 ("COBRA COVERAGE") for the period of
          such coverage (unless the coverage is then provided under a
          self-insured plan);

          pay you, at the time the Company would otherwise pay your annual
          bonus, your pro rata share of the bonus for the year of your
          termination, where the pro rata factor is based on days elapsed in
          your year of termination till date of termination over 365, less any
          portion of the bonus for the year of your termination already paid;
          and

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          accelerate your options such that any options that would become
          exercisable within the six months after your date of termination or
          resignation will become exercisable as a result of your termination or
          resignation (and will expire in accordance with the option's terms
          within 90 days after such date).

     You are not required to mitigate amounts payable under the SEVERANCE
     paragraph by seeking other employment or otherwise, nor must you return to
     the Company amounts earned under subsequent employment.

EXPIRATION

Expiration of this Agreement, whether because of notice of non-renewal or
otherwise, does not constitute termination without CAUSE nor provide you with
GOOD REASON and does not entitle you to SEVERANCE, unless the Company's general
severance practices entitle you to severance in that situation. If you remain
employed at the end of the Term and your employment then ends as a result of
expiration of the Agreement, the Company will pay you severance equal to your
Salary, as then in effect, for 12 months on the same schedule as though you had
remained employed during such period, even though you are no longer employed,
which payments you agree compensate you for the restrictions under Exhibit A
upon contract expiration.

ASSIGNMENT

The Company may assign or otherwise transfer this Agreement and any and all of
its rights, duties, obligations, or interests under it to

     Align Solutions Corp. or any of the affiliates or subsidiaries of the
     Company or

     to any business entity that at any time by merger, consolidation, or
     otherwise acquires all or substantially all of the Company's stock or
     assets or to which the Company transfers all or substantially all of its
     assets.

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Upon such assignment or transfer, any such business entity will be deemed to be
substituted for the Company for all purposes (except that the Company will
remain secondarily liable if it transfers this Agreement to a subsidiary). You
agree that assignment or transfer does not entitle you to Severance. This
Agreement binds and benefits the Company, its successors or assigns, and your
heirs and the personal representatives of your estate. Without the Board's or
your Direct Report's prior written consent, you may not assign or delegate this
Agreement or any or all rights, duties, obligations, or interests under it.

SEVERABILITY

If the final determination of an arbitrator or a court of competent jurisdiction
declares, after the expiration of the time within which judicial review (if
permitted) of such determination may be perfected, that any term or provision of
this Agreement, including any provision of Exhibit A, is invalid or
unenforceable, the remaining terms and provisions will be unimpaired, and the
invalid or unenforceable term or provision will be deemed replaced by a term or
provision that is valid and enforceable and that comes closest to expressing the
intention of the invalid or unenforceable term or provision.

AMENDMENT; WAIVER

Neither you nor the Company may modify, amend, or waive the terms of this
Agreement other than by a written instrument signed by you and an executive
officer of the Company duly authorized by the Board. Either party's waiver of
the other party's compliance with any provision of this Agreement is not a
waiver of any other provision of this Agreement or of any subsequent breach by
such party of a provision of this Agreement.

WITHHOLDING

The Company will reduce its compensatory payments to you for withholding and
FICA taxes and any other withholdings and contributions required by law. The
Company will, if reasonably practicable, credit you with the FICA and
unemployment tax withholdings you incurred in 1999 before the Effective Date.

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GOVERNING LAW

The laws of the State of Texas (other than its conflict of laws provisions)
govern this Agreement.

NOTICES

Notices must be given in writing by personal delivery, by certified mail, return
receipt requested, by telecopy, or by overnight delivery. You should send or
deliver your notices to the Company's corporate headquarters. The Company will
send or deliver any notice given to you at your address as reflected on the
Company's personnel records. You and the Company may change the address for
notice by like notice to the others. You and the Company agree that notice is
received on the date it is personally delivered, the date it is received by
certified mail, the date of guaranteed delivery by the overnight service, or the
date the fax machine confirms effective transmission.

SUPERSEDING EFFECT

This Agreement supersedes any prior oral or written employment, severance,
option, or fringe benefit agreements between you and the Company, other than
with respect to your eligibility for generally applicable employee benefit
plans. This Agreement supersedes all prior or contemporaneous negotiations,
commitments, agreements, and writings with respect to the subject matter of this
Agreement (other than the Agreement and Plan of Organization dated as of June 2,
1999). All such other negotiations, commitments, agreements, and writings will
have no further force or effect; and the parties to any such other negotiation,
commitment, agreement, or writing will have no further rights or obligations
thereunder.

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If you accept the terms of this Agreement, please sign in the space indicated
below. We encourage you to consult with any advisors you choose.

                                                  LUMINANT WORLDWIDE CORPORATION

                                          By: /s/ Guillermo G. Marmol
                                              -----------------------------
                                              Guillermo G. Marmol
                                              Chief Executive Officer

I accept and agree to the terms of employment set forth in this Agreement:

/s/  K.  David Quackenbush
----------------------------------
  K.  David Quackenbush

Dated:    September 15, 1999
      ____________________________

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                                    EXHIBIT A

NO COMPETITION

You agree to the provisions of this Exhibit A in consideration of (i) your
employment by the Company and salary and benefits under this Agreement and the
training you will receive in connection with such employment and (ii) the
Company's acquisition of your prior employer, and you agree that Exhibit A
should be considered ancillary to the agreement by which that employer was
acquired or otherwise became part of the Company or a subsidiary (the
"ACQUISITION AGREEMENT"). While the Company (or its successor or transferee)
employs you and to the end of the Restricted Period (as defined below), you
agree as follows:

You will not, directly or indirectly, be employed by, lend money to, or engage
in any Competing Business within the Market Area (each as defined below). That
prohibition includes, but is not limited to, acting, either singly or jointly or
as agent for, or as an employee of or consultant to, any one or more persons,
firms, entities, or corporations directly or indirectly (as a director,
independent contractor, representative, consultant, member, or otherwise) that
constitutes such a Competing Business. You also will not invest or hold equity
or options in any Competing Business, provided that you may own up to 3% of the
outstanding capital stock of any corporation that is actively publicly traded
without violating this NO COMPETITION covenant, so long as you have no
involvement beyond passive investing in such business and you comply with the
second sentence of this paragraph.

If, during the Restricted Period, you are offered and want to accept employment
with a business that engages in activities similar to the Company's, you will
inform your Direct Report in writing of the identity of the business, your
proposed duties with that business, and the proposed starting date of that
employment. You will also inform that business of the terms of this Exhibit A.
The Company will analyze the proposed employment and make a good faith
determination as to whether it would threaten the Company's

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legitimate competitive interests. If the Company determines that the proposed
employment would not pose an unacceptable threat to its interests, the Company
will notify you that it does not object to the employment.

You acknowledge that, during the portion of the Restricted Period that follows
your employment, you may engage in any business activity or gainful employment
of any type and in any place except as described above. You acknowledge that you
will be reasonably able to earn a livelihood without violating the terms of this
Agreement.

You understand and agree that the rights and obligations set forth in this NO
COMPETITION Section will continue and will survive through the Restricted
Period.

     DEFINITIONS

          COMPETING BUSINESS

COMPETING BUSINESS means any service or product of any person or organization
other than the Company and its successors, assigns, or subsidiaries
(collectively, the "COMPANY GROUP") that competes with any service or product of
the Company Group provided by any member of the Company Group during your
employment. COMPETING BUSINESS includes any enterprise engaged in the formation
or operation of internet professional services firms that provide strategic,
interactive design and technical business services, information technology and
interactive business consulting, and other related services to assist clients in
integrating and maintaining their electronic commerce capabilities.

          MARKET AREA

The Market Area consists of the United States and Canada. You agree that the
Company provides services both at its facilities and at the locations of its
customers or clients and that, by the nature of its business, it operates
globally.

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          RESTRICTED PERIOD

For purposes of this Agreement, the RESTRICTED PERIOD ends at the first
anniversary of the date your employment with the Company Group ends for any
reason, provided that the end of the RESTRICTED PERIOD does not shorten any
restrictions to which you are bound by the Acquisition Agreement.

NO INTERFERENCE; NO SOLICITATION

During the Restricted Period, you agree that you will not, directly or
indirectly, whether for yourself or for any other individual or entity (other
than the Company or its affiliates or subsidiaries), intentionally

     solicit any person or entity who is, or was, within the 24 months preceding
     your date of termination or resignation, a customer, prospect (with respect
     to which any member of the Company Group has incurred substantial costs or
     with which you have been involved), or client of the Company Group within
     the Market Area, with the 24 month period reduced to 12 months for
     prospects with which you have not been involved;

     hire away or endeavor to entice away from the Company Group any employee or
     any other person or entity whom the Company Group engages to perform
     services or supply products and including, but not limited to, any
     independent contractors, consultants, engineers, or sales representatives
     or any contractor, subcontractor, supplier, or vendor; or

     hire any person whom the Company Group employs or employed within the prior
     12 months.

SECRECY

     PRESERVING COMPANY CONFIDENCES

Your employment with the Company under and, if applicable, before this Agreement
(with a predecessor to a member of the Company Group), has given and will give
you access to Confidential Information (as defined below). You acknowledge and
agree that using, disclosing, or publishing any Confidential

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Information in an unauthorized or improper manner could cause the Company or
Company Group to incur substantial loss and damages that could not be readily
calculated and for which no remedy at law would be adequate. Accordingly, you
agree with the Company that you will not at any time, except in performing your
employment duties to the Company or the Company Group under this Agreement (or
with the Board's or your Direct Report's prior written consent), directly or
indirectly, use, disclose, or publish, or permit others not so authorized to
use, disclose, or publish any Confidential Information that you may learn or
become aware of, or may have learned or become aware of, because of your prior
or continuing employment, ownership, or association with the Company or the
Company Group or any of their predecessors, or use any such information in a
manner detrimental to the interests of the Company or the Company Group.

     PRESERVING OTHERS' CONFIDENCES

You agree not to use in working for the Company Group and not to disclose to the
Company Group any trade secrets or other information you do not have the right
to use or disclose and that the Company Group is not free to use without
liability of any kind. You agree to promptly inform the Company in writing of
any patents, copyrights, trademarks, or other proprietary rights known to you
that the Company or the Company Group might violate because of information you
provide.

     CONFIDENTIAL INFORMATION

"CONFIDENTIAL INFORMATION" includes, without limitation, information that the
Company or the Company Group has not previously disclosed to the public or to
the trade with respect to the Company's or the Company Group's present or future
business, including its operations, services, products, research, inventions,
discoveries, drawings, designs, plans, processes, models, technical information,
facilities, methods, trade secrets, copyrights, software, source code, systems,
patents, procedures, manuals, specifications, any other intellectual property,
confidential reports, price lists, pricing formulas, customer lists, financial
information (including the revenues, costs, or profits associated with any of
the

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Company's or the Company Group's products or services), business plans, lease
structure, projections, prospects, opportunities or strategies, acquisitions or
mergers, advertising or promotions, personnel matters, legal matters, any other
confidential and proprietary information, and any other information not
generally known outside the Company or the Company Group that may be of value to
the Company or the Company Group but, notwithstanding anything to the contrary,
excludes any information properly in the public domain. "CONFIDENTIAL
INFORMATION" also includes confidential and proprietary information and trade
secrets that third parties entrust to the Company or the Company Group in
confidence.

You understand and agree that the rights and obligations set forth in this
SECRECY Section will continue indefinitely and will survive termination of this
Agreement and your employment with the Company or the Company Group.

EXCLUSIVE PROPERTY

You confirm that all Confidential Information is and must remain the exclusive
property of the Company or the relevant member of the Company Group. Any office
equipment (including computers) you receive from the Company Group in the course
of your employment and all business records, business papers, and business
documents you keep or make, whether on digital media or otherwise, in the course
of your employment by the Company relating to the Company or any member of the
Company Group must be and remain the property of the Company or the relevant
member of the Company Group. Upon the termination of this Agreement with the
Company or upon the Company's request at any time, you must promptly deliver to
the Company or to the relevant member of the Company Group any such office
equipment (including computers) and any Confidential Information or other
materials (written or otherwise) not available to the public or made available
to the public in a manner you know or reasonably should recognize the Company
did not authorize, and any copies, excerpts, summaries, compilations, records,
or documents you made or that came into your possession during

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your employment. You agree that you will not, without the Company's consent,
retain copies, excerpts, summaries, or compilations of the foregoing information
and materials. You understand and agree that the rights and obligations set
forth in this EXCLUSIVE PROPERTY Section will continue indefinitely and will
survive termination of this Agreement and your employment with the Company
Group.

COPYRIGHTS, DISCOVERIES, INVENTIONS, AND PATENTS

You agree that all records, in whatever media (including written works),
documents, papers, notebooks, drawings, designs, technical information, source
code, object code, processes, methods or other copyrightable or otherwise
protected works you conceive, create, make, invent, or discover that relate to
or result from any work you perform or performed for the Company or the Company
Group or that arise from the use or assistance of the Company Group's
facilities, materials, personnel, or Confidential Information in the course of
your employment (whether or not during usual working hours), whether conceived,
created, discovered, made, or invented individually or jointly with others, will
be and remain the absolute property of the Company (or another appropriate
member of the Company Group, as specified by the Company), as will all the
worldwide patent, copyright, trade secret, or other intellectual property rights
in all such works. (All references in this section to the Company include the
members of the Company Group, unless the Company determines otherwise.) You
irrevocably and unconditionally waive all rights, wherever in the world
enforceable, that vest in you (whether before, on, or after the date of this
Agreement) in connection with your authorship of any such copyrightable works in
the course of your employment with the Company Group or any predecessor. Without
limitation, you waive the right to be identified as the author of any such works
and the right not to have any such works subjected to derogatory treatment. YOU
RECOGNIZE ANY SUCH WORKS ARE "WORKS FOR HIRE" OF WHICH THE COMPANY IS THE
AUTHOR.

You will promptly disclose, grant, and assign ownership to the Company for its
sole use and benefit any and all ideas, processes,

Employment Agreement with K. David Quackenbush                     Page 18 of 23

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inventions, discoveries, improvements, technical information, and copyrightable
works (whether patentable or not) that you develop, acquire, conceive or reduce
to practice (whether or not during usual working hours) while the Company or the
Company Group employs you. You will promptly disclose and hereby grant and
assign ownership to the Company of all patent applications, letters patent,
utility and design patents, copyrights, and reissues thereof or any foreign
equivalents thereof, that may at any time be filed or granted for or upon any
such invention, improvement, or information. In connection therewith:

     You will, without charge but at the Company's expense, promptly execute and
     deliver such applications, assignments, descriptions, and other instruments
     as the Company may consider reasonably necessary or proper to vest title to
     any such inventions, discoveries, improvements, technical information,
     patent applications, patents, copyrightable works, or reissues thereof in
     the Company and to enable it to obtain and maintain the entire worldwide
     right and title thereto; and

     You will provide to the Company at its expense all such assistance as the
     Company may reasonably require in the prosecution of applications for such
     patents, copyrights, or reissues thereof, in the prosecution or defense of
     interferences that may be declared involving any such applications,
     patents, or copyrights and in any litigation in which the Company may be
     involved relating to any such patents, inventions, discoveries,
     improvements, technical information, or copyrightable works or reissues
     thereof. The Company will reimburse you for reasonable out-of-pocket
     expenses you incur and pay you reasonable compensation for your time if the
     Company Group no longer employs you.

To the extent, if any, that you own rights to works, inventions, discoveries,
proprietary information, and copyrighted or

Employment Agreement with K. David Quackenbush                     Page 19 of 23

<PAGE>

copyrightable works, or other forms of intellectual property that are
incorporated in the work product you create for the Company Group, you agree
that the Company will have an unrestricted, non-exclusive, royalty-free,
perpetual, transferable license to make, use, sell, offer for sale, and
sublicense such works and property in whatever form, and you hereby grant such
license to the Company (and the Company Group).

This COPYRIGHTS, DISCOVERIES, INVENTIONS AND PATENTS section does not apply to
an invention or discovery for which no equipment, supplies, facility or trade
secret information of the Company Group (including its predecessors) was used
and that was developed entirely on your own time, unless (a) the invention
relates (i) directly to the business of the Company Group, or (ii) the Company
Group's actual or then reasonably anticipated research or development, or (b)
the invention results from any work you performed for the Company Group or any
predecessor.

MAXIMUM LIMITS

If any of the provisions of Exhibit A are ever deemed to exceed the time,
geographic area, or activity limitations the law permits, you and the Company
agree to reduce the limitations to the maximum permissible limitation, and you
and the Company authorize a court or arbitrator having jurisdiction to reform
the provisions to the maximum time, geographic area, and activity limitations
the law permits; PROVIDED, HOWEVER, that such reductions apply only with respect
to the operation of such provision in the particular jurisdiction with respect
to which such adjudication is made.

INJUNCTIVE RELIEF

Without limiting the remedies available to the Company, you acknowledge

     that a breach of any of the covenants in this Exhibit A may result in
     material irreparable injury to the Company and Company Group for which
     there is no adequate remedy at law, and

Employment Agreement with K. David Quackenbush                     Page 20 of 23

<PAGE>

     that it will not be possible to measure damages for such injuries
     precisely.

You agree that, if there is a breach or threatened breach, the Company or any
member of the Company Group may be entitled to obtain a temporary restraining
order and/or a preliminary or permanent injunction restraining you from engaging
in activities prohibited by any provisions of this Exhibit A or such other
relief as may be required to specifically enforce any of the covenants in this
Exhibit A. The Company or any member of the Company Group will, in addition to
the remedies provided in this Agreement, be entitled to avail itself of all such
other remedies as may now or hereafter exist at law or in equity for
compensation and for the specific enforcement of the covenants contained in this
Agreement. Resort to any remedy provided for in this Section or provided for by
law will not prevent the concurrent or subsequent employment of any other
appropriate remedy or remedies, or preclude the Company's or the Company Group's
recovery of monetary damages and compensation. You also agree that the
Restricted Period or such longer period during which the covenants hereunder by
their terms survive will extend for any and all periods for which a court with
personal jurisdiction over you finds that you violated the covenants contained
in this Exhibit A.

                                    EXHIBIT B
                               DISPUTE RESOLUTION

MEDIATION

If either party has a dispute or claim relating to this Agreement or their
relationship and except as set forth in ALTERNATIVES, the parties must first
seek to mediate the same before an impartial mediator the parties mutually
designate, and the parties must equally share the expenses of such proceeding
(other than their respective attorneys' fees). Subject to the mediator's
schedule, the mediation must occur within 45 days of either party's written
demand. However, in an appropriate circumstance, a party

Employment Agreement with K. David Quackenbush                     Page 21 of 23

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may seek emergency equitable relief from a court of competent jurisdiction
notwithstanding this obligation to mediate.

BINDING ARBITRATION

If the mediation reaches no solution or the parties agree to forego mediation,
the parties will promptly submit their disputes to binding arbitration before
one or more arbitrators (collectively or singly, the "ARBITRATOR") the parties
agree to select (or whom, absent agreement, a court of competent jurisdiction
selects). The arbitration must follow applicable law related to arbitration
proceedings and, where appropriate, the Commercial Arbitration Rules of the
American Arbitration Association.

ARBITRATION PRINCIPLES

All statutes of limitations and substantive laws applicable to a court
proceeding will apply to this proceeding. The Arbitrator will have the power to
grant relief in equity as well as at law, to issue subpoenas duces tecum, to
question witnesses, to consider affidavits (provided there is a fair opportunity
to rebut the affidavits), to require briefs and written summaries of the
material evidence, and to relax the rules of evidence and procedure, provided
that the Arbitrator must not admit evidence it does not consider reliable. The
Arbitrator will not have the authority to add to, detract from, or modify any
provision of this Agreement. The parties agree (and the Arbitrator must agree)
that all proceedings and decisions of the Arbitrator will be maintained in
confidence, to the extent legally permissible, and not be made public by any
party or the Arbitrator without the prior written consent of all parties to the
arbitration, except as the law may otherwise require.

DISCOVERY; EVIDENCE; PRESUMPTIONS

The parties have selected arbitration to expedite the resolution of disputes and
to reduce the costs and burdens associated with litigation. The parties agree
that the Arbitrator should take these concerns into account when determining
whether to authorize discovery and, if so, the scope of permissible discovery
and other hearing and pre-hearing procedures. The Arbitrator may permit
reasonable discovery rights in preparation for the arbitration, provided that it
should accelerate the scheduling of and responses to such discovery so as not to
unreasonably delay the arbitration. Exhibits must be marked and left with the
Arbitrator until it has rendered a decision. Either party may elect, at its
expense, to record

Employment Agreement with K. David Quackenbush                     Page 22 of 23

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the proceedings by audiotape or stenographic recorder (but not by video). The
Arbitrator may conclude that the applicable law of any foreign jurisdiction
would be identical to that of Texas on the pertinent issue(s), absent a party's
providing the Arbitrator with relevant authorities (and copying the opposing
party) at least five business days before the arbitration hearing.

NATURE OF AWARD

The Arbitrator must render its award, to the extent feasible, within 30 days
after the close of the hearing. The award must set forth the material findings
of fact and legal conclusions supporting the award. The parties agree that it
will be final, binding, and enforceable by any court of competent jurisdiction.
Where necessary or appropriate to effectuate relief, the Arbitrator may issue
equitable orders as part of or ancillary to the award. The Arbitrator must
equitably allocate the costs and fees of the proceeding and may consider in
doing so the relative fault of the parties. The Arbitrator may award reasonable
attorneys' fees to the prevailing party to the extent a court could have made
such an award.

APPEAL

The parties may appeal the award based on the grounds allowed by statute, as
well as upon the ground that the award misapplies the law to the facts, provided
that such appeal is filed within the applicable time limits law allows. If the
award is appealed, the court may consider the ruling, evidence submitted during
the arbitration, briefs, and arguments but must not try the case DE NOVO. The
parties will bear the costs and fees associated with the appeal in accordance
with the arbitration award or, in the event of a successful appeal, in
accordance with the court's final judgment.

ALTERNATIVES

This DISPUTE RESOLUTION provision does not preclude a party from seeking
equitable relief from a court (i) to prevent imminent or irreparable injury or
(ii) pending arbitration, to preserve the last peaceable status quo, nor does it
preclude the parties from agreeing to a less expensive and faster means of
dispute resolution. It does not prevent the Company from immediately seeking in
court an injunction or other remedy with respect to Exhibit A.

Employment Agreement with K. David Quackenbush                     Page 23 of 23

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