Document:

<PAGE>

                                                                   EXHIBIT 10.30

         RETIREMENT AGREEMENT AND GENERAL RELEASE

     This Retirement Agreement and General Release ("Agreement") is made and
effective this 20th day of June, 2002 ("Effective Date"), by and among
RemedyTemp, Inc., and Remedy Temporary Services, Inc. (collectively, "Remedy"),
and Alan M. Purdy ("Purdy"). Remedy and Purdy shall sometimes be referred to
individually as the "Party" and collectively as the "Parties."

                                            Recitals

     Whereas, Purdy is an officer and employee of Remedy and has notified Remedy
that he shall retire from and resign his positions as an officer and employee of
Remedy, effective January 1, 2003;

     Whereas, Remedy has agreed to provide Purdy with certain retirement
compensation, as more fully described in this Agreement (collectively
"Retirement Payments"), in exchange for the releases contained herein;

     Whereas, in light of the lengthy employment relationship between the
Parties, and the numerous benefits and rights previously granted to Purdy, none
of which the Parties intend to waive or cancel, except as specifically set forth
herein, the Parties wish to provide certain background information to help
identify the benefits and rights owned by Purdy, as well as the additional
rights and benefits granted to Purdy pursuant to this Agreement;

     Whereas, the Parties entered into three separate deferred compensation
plans, which are identified by date, as follows: February 16, 1994 (supplemented
February 4, 1997, and later amended and restated April 14, 2000) (hereinafter
"1994 Plan"); November 27, 1996 (amended and restated April 14, 2000)
(hereinafter "1996 Plan"); RemedyTemp, Inc., Deferred Compensation Plan
effective September 29, 1997 (amended and restated February 21, 2000, and
further amended June 4, 2001) (hereinafter "1997 Plan");

     Whereas, Remedy also created the RemedyTemp, Inc.1996 Stock Incentive Plan
(amended and restated effective August 16, 1999) (hereinafter "Stock Incentive
Plan"), pursuant to which Purdy has received certain awards thereunder; and

     Whereas, on or about June 1, 1999, the Parties entered into that certain
Severance Agreement dated June 1, 1999 (the "Severance Agreement").

     Now therefore, in consideration of the foregoing recitals, which are made a
part of this Agreement, and the mutual promises, terms and conditions contained
herein, the Parties agree as follows:

     1. Purdy hereby confirms his resignation and retirement as an employee and
officer from Remedy, effective as of January 1, 2003 (the "Retirement Date").
Until the Retirement

<PAGE>

Date, Purdy shall continue to perform those functions designated by Remedy's
President and Chief Executive Officer, shall work from Remedy's headquarters and
maintain office space designated by Remedy's President and Chief Executive
Officer and shall continue to receive the same compensation and benefits package
that he receives as of the Effective Date until the Retirement Date. In the
event Remedy elects to replace Purdy prior to the Retirement Date, Purdy shall
continue to receive his full compensation and benefits until the Retirement Date
regardless of whether or not he continues to perform services for Remedy.

     2. Remedy agrees to pay to Purdy a total of $41,744, less applicable taxes
and withholdings ("Retirement Bonus") no later than November 30, 2002. Further,
Remedy agrees to pay to Purdy all earned portions of his fiscal year 2002 Bonus
("2002 Bonus") no later than November 30, 2002. Finally, Purdy shall be eligible
to receive a pro-rated portion of what would be his fiscal year 2003 bonus
equaling $41,131, which is 25% of the maximum bonus potential of $164,524 ("2003
Bonus"). Payment of the 2003 Bonus to Purdy shall be no later than January 31,
2003 and shall be based on the satisfaction of criteria set by Remedy, in its
sole discretion, and presented to Purdy in writing at the time that such bonus
criteria is established for Remedy's officers. The Retirement Bonus, 2002 Bonus
(if any) and 2003 Bonus (if any) shall be designated as deferred compensation
and placed into the 1997 Plan for the benefit of Purdy. Remedy shall also
provide Purdy with the following retirement benefits: (i) payment of the 2003
annual premium of Purdy's current life insurance due in January 2003; (ii)
payment of Purdy's current health insurance premiums until the age of 65
(including medical, dental, vision and ExecuCare or comparable plans for Purdy
and his spouse); (iii) the grant of an option to purchase 61,100 shares of
RemedyTemp, Inc., common stock at the fair market value as of June 20, 2002
("New Stock Options"); (iv) ownership of the computers, scanners, printers and
related equipment used by Purdy at his home and at his corporate office as of
the Retirement Date; and (v) the use of an office, including Internet and
telecommunication services, at Remedy's headquarters in a size and location, and
for a duration, to be determined by the President and Chief Executive Officer.
The payments and benefits delineated in Sections 1 and 2 of this Agreement are
collectively referred to herein as the "Retirement Payments."

     3. On or about January 1, 2003, Remedy shall also pay to Purdy all unused
and accrued vacation and sick days ("Vacation Pay"). Furthermore, until the
Retirement Date and thereafter, Remedy shall continue to provide to Purdy such
indemnification and liability coverage for actions and events that occur on or
prior to the Retirement Date, including, without limitation, worker's
compensation, director and officer liability coverage, corporate indemnification
and disability coverage (collectively, "Liability Coverage"), but only to the
extent such Liability Coverage is provided by law or by Remedy to its other
officers and employees under Remedy's then current policies and benefits plan in
effect as of the Retirement Date, which ever coverage is greater. Accordingly,
the Parties agree that the Vacation Pay, the Liability Coverage, the deferred
compensation due under the 1994 Plan, the 1996 Plan, the 1997 Plan, the
Retirement Payments, Purdy's rights and awards under the Stock Incentive Plan,
the New Stock Options and any amounts due under the Severance Agreement
(collectively "Vested Benefits") shall be the only compensation which Remedy
shall pay to Purdy, and all other wages, bonuses, incentive compensation, claims
for compensation or any other form of compensation whatsoever are hereby waived.

                                       2

<PAGE>

     4. The Parties acknowledge and agree that notwithstanding anything to the
contrary contained in the Severance Agreement and that certain Restricted Stock
Grant Agreement between the Parties, the general release and release of unknown
claims provisions contained therein shall not apply to the Vested Benefits. The
Parties further acknowledge and agree that notwithstanding anything to the
contrary contained in the Stock Incentive Plan, the New Stock Options shall
fully vest on June 20, 2002 and Purdy shall have 10 years from the grant date to
exercise the New Stock Options.

     5. Except for those obligations created by or arising out of this Agreement
and the Vested Benefits, Purdy on behalf of himself, his descendants,
dependents, heirs, executors, administrators, assigns, and successors, and each
of them, hereby covenants not to sue and fully releases and discharges Remedy,
and its parent, subsidiaries, related business entities and affiliates, past and
present, and each of them, as well as its and their trustees, directors,
officers, agents, attorneys, insurers, employees, shareholders, representatives,
assigns, and successors, past and present, and each of them, hereinafter
together and collectively referred to as "Releasees," with respect to and from
any and all claims, wages, demands, rights, liens, agreements, contracts,
covenants, actions, suits, causes of action, obligations, debts, costs,
expenses, attorneys' fees, damages, judgments, orders and liabilities of
whatever kind or nature in law, equity or otherwise, whether now known or
unknown, suspected or unsuspected, and whether or not concealed or hidden, which
he now owns or holds or he has at any time heretofore owned or held or may in
the future hold as against said Releasees, arising out of or in any way
connected with his employment relationship with Remedy, or his voluntary
resignation from employment or any other transactions, occurrences, acts or
omissions or any loss, damage or injury whatever, known or unknown, suspected or
unsuspected, resulting from any act or omission by or on the part of said
Releasees, or any of them, committed or omitted prior to the Effective Date
including, without limiting the generality of the foregoing, any claim under
Title VII of the Civil Rights Act of 1964, the Age Discrimination in Employment
Act, the Americans with Disabilities Act, the Family and Medical Leave Act of
1993, the California Fair Employment and Housing Act, the California Family
Rights Act, or any claim for severance pay, bonus, sick leave, holiday pay,
vacation pay, life insurance, health or medical insurance or any other fringe
benefit, workers' compensation or disability. In consideration for the terms
contained herein, Purdy shall execute a General Release of Remedy, with the same
exceptions as contained in this Agreement, on the Retirement Date for the period
of time between the Effective Date and the Retirement Date.

     6. Except for those obligations created by or arising out of this
Agreement, the Liability Coverage and the Vested Benefits, it is the intention
of Purdy in executing this Agreement that the same shall be effective as a bar
to each and every claim, demand and cause of action hereinabove specified. In
furtherance of this intention, and except for those obligations created by or
arising out of this Agreement, the Liability Coverage and the Vested Benefits,
Purdy hereby expressly waives any and all rights and benefits conferred upon him
by the provisions of SECTION 1542 OF THE CALIFORNIA CIVIL CODE and expressly
consents that this Agreement shall be given full force and effect according to
each and all of its express terms and provisions, including those related to
unknown and unsuspected claims, demands and causes of action, if any, as well as
those relating to any other claims, demands and causes of action hereinabove
specified. SECTION 1542 provides:

                                       3

<PAGE>

          "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE CREDITOR DOES
          NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT THE TIME OF EXECUTING THE
          RELEASE, WHICH IF KNOWN BY HIM MUST HAVE MATERIALLY AFFECTED HIS
          SETTLEMENT WITH THE DEBTOR."

     7.   Purdy expressly acknowledges and agrees that, by entering into this
Agreement, he is waiving any and all rights or claims that he may have arising
under the Age Discrimination in Employment Act of 1967, as amended, which have
arisen on or before the date of execution of this Agreement. Purdy further
expressly acknowledges and agrees that:

          (a) In return for this Agreement, he will receive consideration beyond
     that which he was already entitled to receive before entering into this
     Agreement;

          (b) He is hereby advised in writing by this Agreement to consult with
     an attorney before signing this Agreement;

          (c) He was given a copy of this Agreement on May 8, 2002, and informed
     that he had 21 days within which to consider the Agreement; and

          (d) He is hereby advised that he has seven (7) days after execution to
     revoke the Agreement, and to that end this Agreement will not become
     effective or enforceable until the expiration of such seven-day period. Any
     revocation must be delivered to Remedy's legal department.

     8.   The Parties agree and covenant that they shall continue to conduct
themselves in a professionally acceptable manner and will not make any negative
or disparaging comments about the other Party, including, without limitation,
the other Party's affiliated entities, officers, employees or directors
commencing as of the Effective Date. Further, Purdy agrees to maintain the
confidentiality of all of Remedy trade secrets, including its proprietary
business approaches, strategies and systems. Violation of this Section 8 shall
be a material breach of this Agreement

     9.   This instrument constitutes and contains the entire agreement and
final understanding of Purdy's employment, the termination thereof, and the
other subject matters addressed herein between the parties. Any modifications to
this Agreement must be in writing and signed by Purdy and Remedy to be binding
on the parties. Purdy acknowledges that he is not relying on any statement or
representation of Remedy, its employees or agents with respect to the subject
matter, basis or effect of this Agreement. This Agreement shall inure to and be
binding on each Party's successor in interest. This Agreement shall not be
assignable, other than to a successor of Remedy pursuant to a merger of Remedy
or a purchase of Remedy or a purchase of all or substantially all of Remedy's
assets.

     10.  The prevailing party in any litigation relating to an alleged breach
of this Agreement shall be entitled to an award of its reasonable attorneys'
fees and costs. This Agreement shall be governed by the internal laws of the
State of California.

     11.  Purdy acknowledges that he fully understands his right to discuss this
Agreement

                                       4

<PAGE>

with an attorney, that he has carefully read and fully understands this entire
Agreement and that he is voluntarily entering into this Agreement.

     12. Any breach or default of obligations hereunder shall not release the
non-breaching party of its or his duties and obligations hereunder.

     13. Purdy, or his agents, upon 10 days written notice to Remedy, shall have
the right to inspect, audit and copy, during regular business hours, the books
and records of Remedy that relate to Purdy's deferred compensation under the
1994 Plan, 1996 Plan, and the 1997 Plan (the "Inspection"). In the event the
Inspection reveals an error detrimental to Purdy, Remedy shall immediately
correct the error, including interest, and reimburse Purdy for the cost of the
Inspection, including reasonable attorneys' and accounting fees. Otherwise, the
Inspection shall be at Purdy's sole expense.

     IN WITNESS WHEREOF, the Parties have executed this Agreement as of the
Effective Date.

                                  ALAN M. PURDy

                                  /s/ ALAN M. PURDY
                                  -----------------
                                  Alan M. Purdy

                                  REMEDYTEMP, INC.

                                  By:      /s/ GREG PALMER
                                           ---------------

                                  Printed: Greg Palmer
                                           -----------

                                  Title: President and Chief Executive Officer

                                  REMEDY TEMPORARY SERVICES, INC.

                                  By:      /s/ GREG PALMER
                                           ---------------

                                  Printed: Greg Palmer
                                           -----------

                                  Title: President and Chief Executive Officer

                                       5EXHIBIT 4.3.28

--------------------------------------------------------------------------------
THIS WARRANT AND ANY SECURITIES  ACQUIRED UPON THE EXERCISE OF THIS WARRANT HAVE
NOT BEEN  REGISTERED  UNDER:  (A) THE  SECURITIES  ACT OF 1933,  AS AMENDED,  IN
RELIANCE UPON THE EXEMPTIONS FROM  REGISTRATION  PROVIDED IN SECTIONS 3 AND 4 OF
SUCH  ACT  AND/OR  REGULATIONS  D  PROMULGATED  THEREUNDER;  OR  (B)  ANY  STATE
SECURITIES  LAWS  IN  RELIANCE  UPON  APPLICABLE  EXEMPTIONS  THEREUNDER.  THESE
SECURITIES  MUST BE ACQUIRED FOR INVESTMENT ONLY FOR THE ACCOUNT OF THE INVESTOR
AND MAY NOT BE SOLD OR  TRANSFERRED  IN THE  ABSENCE OF  REGISTRATION  UNDER THE
SECURITIES  LAWS OR AN OPINION OF COUNSEL  ACCEPTABLE TO THE  CORPORATION OR ITS
REPRESENTATIVES  THAT  SUCH  SALE  OR  TRANSFER  WOULD  NOT  VIOLATE  APPLICABLE
SECURITIES LAWS OR REGULATIONS.
--------------------------------------------------------------------------------

Warrant No.                                          To Purchase
           ------                                               ---------------
                                                     Shares of Common Stock
                                                     ($0.001 par value)

                      CLASS "AS" WARRANT TO PURCHASE SHARES
                               OF COMMON STOCK OF
                                  PROBEX CORP.
                            (A DELAWARE CORPORATION)

                         PURCHASE PRICE PER SHARE: $0.75

EXPIRATION DATE: 5:00 p.m., Dallas, Texas Time, On July 29, 2007

         THIS CERTIFIES that, for value received,

is the registered owner and is entitled,  subject to the terms and conditions of
this  Warrant,  until the  Expiration  Date, to purchase the number of shares of
common  stock,  $0.001 par value (the  "Common  Stock"),  of Probex  Corp.  (the
"Corporation")  set forth above from the  Corporation  at the purchase price set
forth above.  The number of shares of Common Stock that may be received upon the
exercise of this Warrant and the price to be paid for each share of Common Stock
are subject to adjustment from time to time as hereinafter set forth.

1. Exercise of Warrant.  Subject to the provisions  hereof,  this Warrant may be
exercised  in whole or in part until the  Expiration  Date,  by delivery of this
Warrant to the  Corporation  with the exercise form duly executed and payment of
the purchase price (in cash or by certified or bank cashier's check made payable
to the order of the Corporation) for each share purchased.

2.  Corporation's  Covenants as to Common  Stock.  Shares  deliverable  upon the
exercise of this Warrant shall, at delivery,  be fully paid and  non-assessable,
free from  taxes,  liens,  and  charges  with  respect  to their  purchase.  The
Corporation shall at all times,  subject to any required  stockholder  approvals
pursuant to Section 3.20 of that certain  Intercreditor and Security  Agreement,
dated as of March  29,  2002,  by and  among  the  Corporation  and the  parties

<PAGE>
Class "AS" Warrant No. ___
Page 2

thereto, reserve and hold available sufficient shares of Common Stock to satisfy
all  conversion  and  purchase  rights of  outstanding  convertible  securities,
options and warrants.

3. Method of Exercise;  Fractional  Shares.  The purchase rights  represented by
this Warrant are  exercisable at the option of the registered  owner in whole at
any time,  or in part,  from time to time,  within the period  specified  above;
provided,  however,  that purchase rights are not exercisable  with respect to a
fraction  of a share of Common  Stock.  In lieu of issuing a fraction of a share
remaining after exercise of this Warrant as to all full shares covered hereby or
scrip, the Corporation shall pay therefor cash equal to the same fraction of the
then current  Warrant  purchase price per share. In case of the exercise of this
Warrant for less than all the shares  purchasable,  the Corporation shall cancel
this  Warrant  and  execute and deliver a new Warrant of like tenor and date for
the balance of the shares purchasable hereunder.

4. Adjustment of Exercise Price. If after the date hereof and on or prior to the
date of the second anniversary of the payment in full of that certain promissory
note made by the Corporation to the original holder of this Warrant, dated as of
July 29,  2002,  the  Corporation  shall (i) issue,  (ii) enter into any binding
agreement to issue,  or (iii)  commence  any public or private  offering for the
issuance of, shares of Common Stock, warrants to purchase shares of Common Stock
or securities that are convertible  into shares of Common Stock, in an aggregate
amount of at least  100,000  shares of Common  Stock  (excluding  any options to
purchase  Common Stock issued  pursuant to any employee stock option plan of the
Corporation),  and the  issuance,  exercise or conversion  price (the  "Issuance
Price") of such  Common  Stock is less than $0.75 per share,  then the  exercise
price per share pursuant to this Warrant shall be adjusted (and the  Corporation
shall,  after  occurrence of any event  requiring  such  adjustment,  notify the
holder of this Warrant of the  adjustment)  so that the exercise  price shall be
equal to the Issuance Price.  For purposes of this section,  a public or private
offering shall be deemed to have commenced if the there is substantial agreement
as to the material terms of such offering.

5.  Redemption.  The  Corporation  has no  redemption  rights  pursuant  to this
Warrant.

6.  Limited  Rights of Owner.  This  Warrant  does not  entitle the owner to any
voting rights or other rights as a  shareholder  of the  Corporation,  or to any
other rights  whatsoever  except the rights expressed  herein.  No dividends are
payable  or will  accrue on this  Warrant or the  shares  purchasable  hereunder
until, and except to the extent that, this Warrant is exercised.

7.  Exchange  for Other  Denominations.  This  Warrant is  exchangeable,  on its
surrender by the registered owner to the  Corporation,  for new Warrants of like
tenor and date representing in the aggregate the right to purchase the number of
shares purchasable hereunder in denominations designated by the registered owner
at the time of surrender.

8. Transfer.  Except as otherwise provided, this Warrant is transferable only on
the books of the  Corporation by the registered  owner in person or by attorney,
on surrender of this Warrant,  properly endorsed.  However, because this Warrant
has not been  registered  under the  Securities  Act of 1933,  as  amended  (the
"Securities Act"), and applicable state securities laws, this Warrant may not be
sold or transferred in the absence of an effective  registration of it under the
Securities Act and all other applicable securities laws or an opinion of counsel
acceptable to the Corporation or its representatives  that such sale or transfer
would not violate  applicable  securities laws or regulations.  Any Common Stock
purchased  upon  exercise  of this  Warrant  shall  also be  subject to the same
restrictions  on transfer and will contain the same or similar  transfer  legend
found on the face of this Warrant.

<PAGE>
Class "AS" Warrant No. ___
Page 3

9. Registration  Rights.  The terms of Section 7 of that certain Loan Agreement,
dated as of July 29, 2002,  by and among the  Corporation,  the original  holder
hereof and the other parties  signatories  thereto,  are hereby  incorporated by
reference as if set forth herein in full.

10.  Recognition of Registered Owner.  Prior to due presentment for registration
of transfer of this Warrant,  the Corporation may treat the registered  owner as
the person  exclusively  entitled to receive  notices and  otherwise to exercise
rights hereunder.

11. Effect of Stock Split,  etc. If the Corporation,  by stock dividend,  split,
reverse split,  reclassification of shares, or otherwise, changes as a whole the
outstanding Common Stock into a different number or class of shares, then:

         (1) the number and class of shares so changed  shall,  for the purposes
of this Warrant, replace the shares outstanding immediately prior to the change;
and

         (2) the  Warrant  purchase  price in  effect,  and the number of shares
purchasable  under this  Warrant,  immediately  prior to the date upon which the
change becomes effective,  shall be  proportionately  adjusted (the price to the
nearest cent).

12. Effect of Merger,  etc. If the Corporation  consolidates with or merges into
another  corporation,  the  registered  owner  shall  thereafter  be entitled on
exercise to purchase,  with  respect to each share of Common  Stock  purchasable
hereunder immediately before the consolidation or merger becomes effective,  the
securities or other consideration to which a holder of one share of Common Stock
is entitled in the  consolidation or merger to assure that all the provisions of
this Warrant shall thereafter be applicable,  as nearly as reasonable may be, to
any  securities  or other  consideration  so  deliverable  on  exercise  of this
Warrant.  The  Corporation  shall  not  consolidate  or merge  unless,  prior to
consummation,  the successor corporation (if other than the Corporation) assumes
the obligations of this Section 12 by written instrument  executed and mailed to
the  registered  owner  at  the  address  of  the  owner  on  the  books  of the
Corporation.  A sale or  lease of all or  substantially  all the  assets  of the
Corporation  for  consideration  (apart  from  the  assumption  of  obligations)
consisting  primarily  of  securities  is a  consolidation  or  merger  for  the
foregoing purposes.

13. Notice of Adjustment.  On the happening of an event  requiring an adjustment
of the Warrant purchase price or shares purchasable  hereunder,  the Corporation
shall forthwith give written notice to the registered owner stating the adjusted
Warrant  purchase price and the adjusted  number and kind of securities or other
property  purchasable  hereunder  resulting  from the event and setting forth in
reasonable  detail  the  method  of  calculation  and the facts  upon  which the
calculation is based. The board of directors of the Corporation,  acting in good
faith, shall determine the calculation. Irrespective of any adjustment or change
in the Warrant purchase price or the number of shares  purchasable under this or
any other Warrant of like tenor, the Warrants  theretofore and thereafter issued
may continue to express the Warrant  purchase  price per share and the number of
shares  purchasable  as were  expressed  in the Warrant when  initially  issued;
provided,  however,  the Corporation  may, in its sole  discretion,  request the
holder of this  Warrant to  exchange  this  Warrant  for a warrant of like tenor
reflecting  such  adjustment  or change  provided for in this  Warrant,  and the
holder of this Warrant agrees to cooperate  with the  Corporation to effect such
exchange.

14. Notice and Effect of  Dissolution,  etc. In case a voluntary or  involuntary
dissolution,  liquidation,  or  winding  up of the  Corporation  (other  than in
connection with a consolidation or merger covered by Section 12 above) is at any
time proposed, the Corporation shall give at least 10 days written notice to the
registered  owner prior to the record date as of which  holders of Common  Stock

<PAGE>
Class "AS" Warrant No. ___
Page 4

will  be  entitled  to  receive  distributions  as  a  result  of  the  proposed
transaction. Such notice shall contain: (1) the date on which the transaction is
to take place;  (2) the record date as of which  holders of Common Stock will be
entitled to receive  distributions as a result of the  transaction;  (3) a brief
description of the transaction;  (4) a brief description of the distributions to
be made to holders of Common  Stock as a result of the  transaction;  and (5) an
estimate of the fair value of the distributions. On the date of the transaction,
if it actually occurs, this Warrant and all rights hereunder shall terminate.

15. Method of Giving Notice;  Extent  Required.  Notices shall be given by first
class mail, postage prepaid, addressed to the registered owner at the address of
the owner  appearing  in the  records of the  Corporation.  No notice to warrant
holders is required except as specified in Sections 4, 9, 13 and 14.

16. Access to Information.  The  Corporation  will provide an opportunity to any
registered  owner  of  this  Warrant  to  ask  questions  of  management  of the
Corporation  and to obtain  information to the extent the  Corporation  has made
such information  publicly available prior to any exercise of the owner's rights
to purchase  Common Stock under this Warrant.  Requests for  information and any
other questions concerning the business and affairs of the Corporation should be
directed to the Vice President of Investor  Relations of the  Corporation at its
main offices.

                  [REMAINDER OF PAGE LEFT BLANK INTENTIONALLY]

<PAGE>
Class "AS" Warrant No. ___
Page 5

         IN WITNESS  WHEREOF,  the  Corporation  has caused  this  Warrant to be
executed and delivered by its duly authorized officer as of the 29th day of July
2002.

                                     PROBEX CORP.

                                     By:      ________________________________
                                     Name:    Bruce A. Hall
                                     Title:   Senior Vice President

<PAGE>
Class "AS" Warrant No. ___
Page 6

                                  TRANSFER FORM

         For  value  received,   the  undersigned  hereby  sells,  assigns,  and
transfers to

Name__________________________________

Address_________________________________

this Warrant and irrevocably appoints attorney (with full power of substitution)
to transfer this Warrant on the books of the Corporation.

Date:

-----------------------------------------

                                           -------------------------------------
                                           (Please sign exactly as name appears
                                           on Warrant)

                                           Taxpayer ID No. _____________________

In the presence of                         Signature guaranteed by

-----------------------------              -------------------------------------

<PAGE>
Class "AS" Warrant No. ___
Page 7

                                  EXERCISE FORM

         The undersigned hereby: (1) irrevocably subscribes for ________________
shares of your Common Stock  pursuant to this Warrant,  and encloses  payment of
$____________________  therefor;  (2) requests that a certificate for the shares
be issued in the name of the undersigned and delivered to the undersigned at the
address  below;  and (3) if  such  number  of  shares  is not all of the  shares
purchasable  hereunder,  that a new Warrant of like tenor for the balance of the
remaining shares purchasable  hereunder be issued in the name of the undersigned
and delivered to the undersigned at the address below.

Date:

----------------------------

                                  ----------------------------------------
                                  (Please sign exactly as name appears on
                                  Warrant)

                                  Address:_________________________________

                                          ---------------------------------

                                  Taxpayer ID No.___________________________

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