<PAGE>

                                  Exhibit 4.23

                          NHANCEMENT TECHNOLOGIES INC.

Issued as of the 1st day            (1)      Aggregate Price: $575,000.00
Of March, 2000                      (2)      Initial Warrant Price:  $11.50
                                    (3)      Number of Shares Initially Subject
                                             to Warrant: 50,000

NEITHER THIS WARRANT, NOR THE COMMON STOCK TO BE ISSUED UPON EXERCISE HEREOF,
HAS BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED ("1933
SECURITIES ACT"), OR QUALIFIED OR REGISTERED UNDER CALIFORNIA OR OTHER
APPLICABLE SECURITIES LAWS ("STATE SECURITIES LAWS"), AND THIS WARRANT HAS BEEN,
AND THE COMMON STOCK TO BE ISSUED UPON EXERCISE HEREOF WILL BE, ACQUIRED FOR
INVESTMENT AND NOT WITH A VIEW TO, OR FOR RESALE IN CONNECTION WITH, ANY
DISTRIBUTION THEREOF. NO SUCH SALE OR OTHER DISPOSITION MAY BE MADE WITHOUT AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE 1933 SECURITIES ACT AND COMPLIANCE
WITH THE APPLICABLE STATE SECURITIES LAWS OR AN OPINION OF COUNSEL, REASONABLY
SATISFACTORY TO THE ISSUER AND ITS COUNSEL, THAT SAID REGISTRATION IS NOT
REQUIRED UNDER THE 1933 SECURITIES ACT AND THAT APPLICABLE STATE SECURITIES LAWS
HAVE BEEN SATISFIED.

                              COMMON STOCK WARRANT

     This certifies that WILLIAM M. STEPHENS, ("PURCHASER"), whose address for
notice is located at 23, Heron Drive, Mill Valley, CA 94941 or any party to whom
this Warrant is assigned in compliance with the terms hereof (Purchaser and any
such assignee being hereinafter sometimes referenced as "HOLDER"), is entitled
to subscribe for and purchase, during the period commencing at the issue date
set forth above and ending at 5:00 p.m., California, local time, on the first
(1st) anniversary of such issue date, the number of shares of fully paid and
nonassessable Common Stock ("COMMON STOCK") of NHANCEMENT TECHNOLOGIES INC, A
DELAWARE CORPORATION (the "COMPANY"), that have an aggregate purchase price
equal to the Aggregate Price as defined below. The purchase price of each such
share shall be equal to the Warrant Price, as defined below.


                                    ARTICLE 1
                                   DEFINITIONS

1.1               "AGGREGATE PRICE" shall be $575,000.00

1.2               "WARRANT PRICE" shall be $11.50 as adjusted herein.



                                    ARTICLE 2
                              EXERCISE AND PAYMENT

2.1  CASH EXERCISE. The purchase rights represented by this Warrant may be
exercised by Holder, in whole or in part, by the surrender of this Warrant at
the principal office of the Company, located at the address set forth on the
signature page hereof, accompanied by the form of Notice of Cash Exercise
attached hereto as Exhibit "B-1", and by the payment to the Company, by cash or
by certified, cashier's or other check acceptable to the Company, of an amount
equal to the aggregate Warrant Price of the shares being purchased.

2.2  NET ISSUE EXERCISE. In lieu of exercising this Warrant pursuant to Section
2.1, Holder may elect to receive shares of Common Stock equal to the value of
this Warrant determined in the manner described below (or of any portion thereof
remaining unexercised) by surrender of this

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Common Stock Warrant
Page 2

Warrant at the principal office of the Company together with the form of Notice
of Cashless Exercise attached hereto as Exhibit "B-2", in which event the
Company shall issue to Holder a number of shares of the Company's Common Stock
computed using the following formula:

                           X = Y (A-B)
                               -------
                                  A

Where X = the number of shares of Common Stock to be issued to Holder.

           Y = the number of shares of Common Stock purchasable under this
               Warrant (at the date of such calculation).

           A = the fair market value of one share of the Company's Common
               Stock (at the date of such calculation).

           B = Warrant Price.

2.3  FAIR MARKET VALUE. For purposes of this Article II, fair market value of
one share of the Company's Common Stock shall mean:

     (i)  The average of the closing bid and asked prices of the Common Stock
     quoted in the Over-The-Counter Market Summary, the last reported sale price
     of the Common Stock or the closing price quoted on the Nasdaq National
     Market System ("NMS") or on any exchange on which the Common Stock is
     listed, whichever is applicable, as published in the Western Edition of The
     Wall Street Journal for the trading day prior to the date of determination
     of fair market value; or

     (ii) If the Common Stock is not traded Over-The-Counter, on the NMS or on
     an exchange, the per share fair market value of the Common Stock shall be
     as determined by mutual agreement of the Company and the Holder; provided,
     however that if such agreement cannot be reached within twenty (20)
     calendar days, such value shall be determined by an independent appraiser
     appointed in good faith by the Company's Board of Directors. The cost of
     such appraisal shall be borne equally by the Company and the Holder. Such
     appraiser shall meet the following criteria: (a) it shall not be associated
     or affiliated with the Company in any fashion and shall not have previously
     provided services to the Company; (b) the appraiser shall have reasonable
     qualifications to appraise the value of the Common Stock; (c) it is not
     (and none of its affiliates is) a promoter, director or officer of the
     Company or any of its affiliates or an underwriter with respect to any of
     the securities of the Company; and (d) it does not provide any advice or
     opinions of the Company except as an appraiser under this section. In the
     event such an appraisal is required it should be conducted under the
     following procedures: the Company shall select the appraiser within ten
     (10) days of receipt of written notice from the Holder that agreement
     cannot be reached and the Company shall submit the name of such appraiser
     to Holder. Twenty (20) days after selection of the appraiser, the Company
     and the Holder shall each submit to the appraiser a single value
     representing such party's contention as to the fair market value of one
     share of the Company's Common Stock. Within fifteen (15) days after receipt
     of the submission of the Company and the Holder, the appraiser shall select
     one of the two values submitted by the parties, and such value shall be the
     fair market value of one share of the Common Stock for purpose of this
     Warrant. The appraiser shall have no discretion to take any action other
     than selection of one of the two values submitted to the appraiser. The
     parties may submit to the appraiser and one another, at the time they
     submit their respective single values, such supporting documentation as
     they deem necessary or appropriate. The parties shall have the opportunity
     seven (7) business days after receipt of the other party's proposed
     valuation and supporting documentation to provide the appraiser and each
     other with supplemental written information. The appraiser may, in its
     discretion, hold a single six (6) hour hearing on valuation issues. If a
     hearing is held, each party shall be allocated three (3) hours. The
     appraiser may conduct the hearing in accordance with any rules of procedure
     it deems appropriate. The value selected by the appraiser shall be final
     and binding upon the parties without any further right of appeal.


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Common Stock Warrant
Page 3


2.4  STOCK CERTIFICATES. In the event of any exercise of the rights represented
by this Warrant, certificates for the shares of Common Stock so purchased shall
be delivered to Holder within a reasonable time and, unless this Warrant has
been fully exercised or has expired, a new Warrant representing the remaining
unexercised Aggregate Price shall also be issued to Holder at such time.

2.5  STOCK FULLY PAID; RESERVATION OF SHARES. The Company covenants and agrees
that all Common Stock which may be issued upon the exercise of the rights
represented by this Warrant will, upon issuance, be fully paid and nonassessable
and free from all taxes, liens and charges with respect to the issue thereof
(excluding taxes based on the income of Holder). The Company further covenants
and agrees that during the period within which the rights represented by this
Warrant may be exercised, the Company will at all times have authorized and
reserved for issuance a sufficient number of shares of its Common Stock or other
securities as would be required upon the full exercise of the rights represented
by this Warrant (including conversion of all such Common Stock issuable
hereunder).

2.6  FRACTIONAL SHARES. No fractional share of Common Stock will be issued in
connection with any exercise hereof; in lieu of a fractional share upon complete
exercise hereof, Holder may purchase a whole share by delivering payment equal
to the appropriate portion of the then effective Warrant Price.

                                    ARTICLE 3
      CERTAIN ADJUSTMENTS OF NUMBER OF SHARES PURCHASABLE AND WARRANT PRICE

     The number and kind of securities purchasable upon the exercise of this
Warrant and the Warrant Price shall be subject to adjustment from time to time
upon the happening of certain events, as follows:

3.1  RECLASSIFICATION, CONSOLIDATION OR MERGER. In case of: (i) any
reclassification or change of outstanding securities issuable upon exercise of
this Warrant; (ii) any consolidation or merger of the Company with or into
another corporation (other than a merger with another corporation in which the
Company is a continuing corporation and which does not result in any
reclassification, change or exchange of outstanding securities issuable upon
exercise of this Warrant); or (iii) any sale or transfer to another corporation
of all, or substantially all, of the property of the Company, then, and in each
such event, the Company or such successor or purchasing corporation, as the case
may be, shall execute a new Warrant of like form, tenor and effect and which
will provide that Holder shall have the right to exercise such new Warrant and
purchase upon such exercise, in lieu of each share of Common Stock theretofore
issuable upon exercise of this Warrant, the kind and amount of securities, money
and property receivable upon such reclassification, change, consolidation,
merger, sale or transfer by a holder of one share of Common Stock issuable upon
exercise of this Warrant had this Warrant been exercised immediately prior to
such reclassification, change, consolidation, merger, sale or transfer. Such new
Warrant shall be as nearly equivalent in all substantive respects as practicable
to this Warrant and the adjustments provided in this Article III and the
provisions of this Section 3.1, shall similarly apply to successive
reclassifications, changes, consolidations, mergers, sales and transfers.

3.2  SUBDIVISION OR COMBINATION OF SHARES. If the Company shall at any time
while this Warrant remains outstanding and less than fully exercised: (i) divide
its Company Stock, the Warrant Price shall be proportionately reduced; or (ii)
shall combine shares of its Common Stock, the Warrant Price shall be
proportionately increased.

3.3  STOCK DIVIDENDS. If the Company, at any time while this Warrant is
outstanding and unexpired, shall pay a dividend payable in, or make any other
distribution to holders of, Common Stock (except any distribution described in
Sections 3.1 and 3.2 hereof) then the Warrant Price shall be adjusted to that
price determined by multiplying the Warrant Price then in effect by a fraction,
the numerator of which shall be the total number of shares of Common Stock
outstanding


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Common Stock Warrant
Page 4


immediately prior to such dividend or distribution, and the denominator of which
shall be the total number of shares of Common Stock outstanding immediately
after such dividend or distribution.

3.4  TIME OF ADJUSTMENTS TO THE WARRANT PRICE. All adjustments to the Warrant
Price and the number of shares purchasable hereunder, unless otherwise specified
herein, shall be effective as of the earlier of:

     (i)   the date of issue of the security causing the adjustment;

     (ii)  the date of sale of the security causing the adjustment;

     (iii) the effective date of a division or combination of shares;

     (iv)  the record date of any action of holders of any class of the
     Company's capital stock taken for the purpose of entitling shareholders to
     receive a distribution or dividend payable in equity securities, provided
     that such division, combination, distribution or dividend actually occurs.

3.5  NOTICE OF ADJUSTMENTS. In each case of an adjustment in the Warrant Price
and the number of shares purchasable hereunder, the Company, at its expense,
shall cause the Chief Financial Officer of the Company to compute such
adjustment and prepare a certificate setting forth such adjustment and showing
in detail the facts upon which such adjustment is based. The Company shall
promptly mail a copy of each such certificate to Holder pursuant to Section 6.8
hereof.

3.6  DURATION OF ADJUSTED WARRANT PRICE. Following each adjustment of the
Warrant Price, such adjusted Warrant Price shall remain in effect until a
further adjustment of the Warrant Price.

3.7  ADJUSTMENT OF NUMBER OF SHARES. Upon each adjustment of the Warrant Price
pursuant to this Article III, the number of shares of Common Stock purchasable
hereunder shall be adjusted to the nearest whole share, to the number obtained
by dividing the Aggregate Price by the Warrant Price as adjusted.

                                    ARTICLE 4
                           TRANSFER, EXCHANGE AND LOSS

4.1  TRANSFER. This Warrant is transferable on the books of the Company at its
principal office by the registered Holder hereof upon surrender of this Warrant
properly endorsed, subject to compliance with federal and state securities laws.
The Company shall issue and deliver to the transferee a new Warrant or Warrants
representing the Warrants so transferred. Upon any partial transfer, the Company
will issue and deliver to Holder a new Warrant or Warrants with respect to the
Warrants not so transferred. Notwithstanding the foregoing, Holder shall not be
entitled to transfer a number of shares or an interest in this Warrant
representing less than five percent (5%) of the aggregate shares initially
covered by this Warrant (as presently constituted, with appropriate adjustment
being made in the event of stock splits, combinations, reorganizations and the
like occurring after the issue date hereof). Any transferee shall be subject to
the same restrictions on transfer with respect to this Warrant as the Purchaser.

4.2  SECURITIES LAWS. Upon any issuance of shares of Common Stock upon exercise
of this Warrant, it shall be the Company's responsibility to comply with the
requirements of: (1) the Securities Act of 1933, as amended; (2) the Securities
Exchange Act of 1934, as amended; (3) any applicable listing requirements of any
national securities exchange; (4) any state securities regulation or "Blue Sky"
laws; and (5) requirements under any other law or regulation applicable to the
issuance or transfer of such shares. If required by the Company, in connection
with each issuance of shares of Common Stock upon exercise of this Warrant, the
Holder will give: (i) assurances in writing, satisfactory to the Company, that
such shares are not being purchased with a view to the distribution thereof in
violation of applicable laws, (ii) sufficient information, in writing, to enable
the Company to rely on exemptions from the registration or qualification
requirements of applicable


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Common Stock Warrant
Page 5


laws, if available, with respect to such exercise, and (iii) its cooperation to
the Company in connection with such compliance.

4.3  EXCHANGE. This Warrant is exchangeable at the principal office of the
Company for Warrants which represent, in the aggregate, the Aggregate Price
hereof; each new Warrant to represent the right to purchase such portion of the
Aggregate Price as Holder shall designate at the time of such exchange. Each new
Warrant shall be identical in form and content to this Warrant, except for
appropriate changes in the number of shares of Common Stock covered thereby, the
percentage stated in Section 4.1 above, and any other changes which are
necessary in order to prevent the Warrant exchange from changing the respective
rights and obligations of the Company and the Holder as they existed immediately
prior to such exchange.

4.4  LOSS OR MUTILATION. Upon receipt by the Company of evidence satisfactory to
it of the ownership of, and the loss, theft, destruction or mutilation of, this
Warrant and (in the case of loss, theft, or destruction) of indemnity
satisfactory to it, and (in the case of mutilation) upon surrender and
cancellation hereof, the Company will execute and deliver in lieu hereof a new
Warrant.

                                    ARTICLE 5
                                  HOLDER RIGHTS

5.1  NO SHAREHOLDER RIGHTS UNTIL EXERCISE. No Holder hereof, solely by virtue
hereof, shall be entitled to any rights as a shareholder of the Company. Holder
shall have all rights of a shareholder with respect to securities purchased upon
exercise hereof at the time: (i) the cash exercise price for such securities is
delivered pursuant to Section 2.1 hereof and this Warrant is surrendered, (ii)
of delivery of notice of cashless exercise pursuant to Section 2.2 hereof and
this Warrant is surrendered, or (iii) of automatic exercise hereof (even if not
surrendered) pursuant to Section 2.5 hereof.

                                    ARTICLE 6
                                  MISCELLANEOUS

6.1  GOVERNMENTAL APPROVALS. The Company will from time to time take all action
which may be necessary to obtain and keep effective any and all permits,
consents and approvals of governmental agencies and authorities and securities
acts filings under federal and state laws, which may be or become requisite in
connection with the issuance, sale, and delivery of this Warrant, and the
issuance, sale and delivery of the Common Stock or other securities or property
issuable or deliverable upon exercise of this Warrant.

6.2  GOVERNING LAWS. IT IS THE INTENTION OF THE PARTIES HERETO THAT EXCEPT AS
SET FORTH BELOW, THE INTERNAL LAWS OF THE STATE OF CALIFORNIA, U.S.A.
(IRRESPECTIVE OF ITS CHOICE OF LAW PRINCIPLES) SHALL GOVERN THE VALIDITY OF THIS
WARRANT, THE CONSTRUCTION OF ITS TERMS, AND THE INTERPRETATION AND ENFORCEMENT
OF THE RIGHTS AND DUTIES OF THE PARTIES HERETO.

6.3  BINDING UPON SUCCESSORS AND ASSIGNS. Subject to, and unless otherwise
provided in, this Warrant, each and all of the covenants, terms, provisions, and
agreements contained herein shall be binding upon, and inure to the benefit of
the permitted successors, executors, heirs, representatives, administrators and
assigns of the parties hereto.

6.4  SEVERABILITY. If any one or more provisions of this Warrant, or the
application thereof, shall for any reason and to any extent be invalid or
unenforceable, the remainder of this Warrant and the application of such
provisions to other persons or circumstances shall be interpreted so as best to
reasonably effect the intent of the parties hereto. The parties further agree to
replace any such void or unenforceable provisions of this Warrant with valid and
enforceable provisions which will achieve, to the extent possible, the economic,
business and other purposes of the void or unenforceable provisions.


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Common Stock Warrant
Page 6


6.5  DEFAULT, AMENDMENT AND WAIVERS. This Warrant may be amended upon the
written consent of the Company and the holders in the aggregate of the right to
purchase a majority of the number of unexercised shares covered by the Warrant
initially issued by the Company pursuant to the Consulting Agreement. The waiver
by a party of any breach hereof for default in payment of any amount due
hereunder or default in the performance hereof shall not be deemed to constitute
a waiver of any other default or any succeeding breach or default. The failure
to cure any breach of any term of this Warrant within ten (10) days of written
notice thereof shall constitute an event of default under this Warrant.

6.6  NO WAIVER. The failure of any party to enforce any of the provisions hereof
shall not be construed to be a waiver of the right of such party thereafter to
enforce such provisions.

6.7  ATTORNEYS' FEES. Should suit be brought to enforce or interpret any part of
this Warrant, the prevailing party shall be entitled to recover, as an element
of the costs of suit and not as damages, reasonable attorneys' fees to be fixed
by the court (including without limitation, costs, expenses and fees on any
appeal). The prevailing party shall be the party entitled to recover its costs
of suit, regardless of whether such suit proceeds to final judgment. A party not
entitled to recover its costs shall not be entitled to recover attorneys' fees.
No sum for attorneys' fees shall be counted in calculating the amount of a
judgment for purposes of determining if a party is entitled to recover costs or
attorneys' fees.

6.8  NOTICES. Whenever any party hereto desires or is required to give any
notice, demand, or request with respect to this Warrant, each such communication
shall be in writing and shall be effective only if it is delivered by personal
service or mailed, United States certified mail, postage prepaid, return receipt
requested, addressed as follows:

                      Company:      NHancement Technologies Inc.
                                    6663 Owens Drive
                                    Pleasanton
                                    California 94588
                                    Attn:  Douglas S. Zorn

                      Holder:       William M. Stephens
                                    23, Heron Drive
                                    Mill Valley, CA 94941

Such communications shall be effective when they are received by the addressee
thereof; but if sent by certified mail in the manner set forth above, they shall
be effective three (3) business days after being deposited in the United States
mail. Any party may change its address for such communications by giving notice
thereof to the other party in conformity with this Section.

6.9  TIME. Time is of the essence of this Warrant.

6.10 CONSTRUCTION OF AGREEMENT. A reference in this Warrant to any Section shall
include a reference to every Section the number of which begins with the number
of the Section to which reference is specifically made (E.G., a reference to
Section 3 shall include a reference to Sections 3.5 and 3.7). The titles and
headings herein are for reference purposes only and shall not in any manner
affect the interpretation of this Warrant.

6.11 NO ENDORSEMENT. Holder understands that no federal or state securities
administrator has made any finding or determination relating to the fairness of
investment in the Company or purchase of the Common Stock hereunder and that no
federal or state securities administrator has recommended or endorsed the
offering of securities by the Company hereunder.


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Common Stock Warrant
Page 7


6.12 PRONOUNS. All pronouns and any variations thereof shall be deemed to refer
to the masculine, feminine or neuter, singular or plural, as the identity of the
person, persons, entity or entities may require.

6.13 FURTHER ASSURANCES. Each party agrees to cooperate fully with the other
parties and to execute such further instruments, documents and agreements and to
give such further written assurances, as may be reasonably requested by any
other party to better evidence and reflect the transactions described herein and
contemplated hereby, and to carry into effect the intents and purposes of this
Warrant.

                         NHancement Technologies Inc., a Delaware corporation



                          By:      /S/ Douglas S. Zorn
                             ------------------------------------------
                              Douglas S. Zorn, Chief Executive Officer


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Common Stock Warrant
Page 8



         EXHIBIT B-1

                   NOTICE OF EXERCISE OF COMMON STOCK WARRANT
                        BY CASH PAYMENT OF WARRANT PRICE

                                          DATE: __________________________

_________________________                 Aggregate Price of Warrant
_________________________                 Before Exercise:  $_______________
_________________________                 Aggregate Price
Attention:  Chief Financial Officer       Being Exercised:  $________________

                                          Warrant Price:    $_________ per share

                                          Number of Shares of Common Stock to
                                          be Issued Under this Notice:_________

                                          Remainder Aggregate
                                          Price (if any) After Issuance: $_____

                                  CASH EXERCISE

Gentlemen:

     The undersigned registered Holder of the Common Stock Warrant delivered
herewith ("WARRANT"), hereby irrevocably exercises such Warrant for, and
purchases thereunder, shares of the Common Stock of NHancement Technologies,
Inc., a Delaware corporation, as provided below. Capitalized terms used herein,
unless otherwise defined herein, shall have the meanings given in the Warrant.
The portion of the Aggregate Price (as defined in the Warrant) to be applied
toward the purchase of Common Stock pursuant to this Notice of Exercise is
$___________ , thereby leaving a remainder Aggregate Price (if any) equal to
$______ . Such exercise shall be pursuant to the cash exercise provisions of
Section 2.1 of the Warrant. Therefore, Holder makes payment with this Notice of
Exercise by way of check payable to the Company in the amount of $_______ . Such
check is payment in full under the Warrant for ___________ shares of Common
Stock based upon the Warrant Price of $_________ per share, as currently in
effect under the Warrant. Holder requests that the certificates for the
purchased shares of Common Stock be issued in the name of and delivered to
"_______________________", __________________________________. To the extent the
foregoing exercise is for less than the full Aggregate Price, a Replacement
Warrant representing the remainder of the Aggregate Price and otherwise of like
form, tenor and effect should be delivered to Holder along with the share
certificates evidencing the Common Stock issued in response to this Notice of
Exercise.

                                             By:
                                                 ------------------------------
                                                            [NAME]

                                      NOTE

     The execution to the foregoing Notice of Exercise must exactly correspond
to the name of the Holder on the Warrant.


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Common Stock Warrant
Page 9

         EXHIBIT B-2

                   NOTICE OF EXERCISE OF COMMON STOCK WARRANT
             PURSUANT TO NET ISSUE ("CASHLESS") EXERCISE PROVISIONS

                                          DATE: __________________________

_________________________                 Aggregate Price of Warrant
_________________________                 Before Exercise:  $_______________
_________________________                 Aggregate Price
Attention:  Chief Financial Officer       Being Exercised:  $________________

                                          Warrant Price:    $_________ per share

                                          Number of Shares of Common Stock to
                                          be Issued Under this Notice:_________

                                          Remainder Aggregate
                                          Price (if any) After Issuance: $______

                                CASHLESS EXERCISE

Gentlemen:

     The undersigned, registered Holder of the Common Stock Warrant delivered
herewith ("WARRANT", hereby irrevocably exercises such Warrant for, and
purchases thereunder, shares of the Common Stock of _NHancement Technologies
Inc., a Delaware corporation, as provided below. Capitalized terms used herein,
unless otherwise defined herein, shall have the meanings given in the Warrant.
The portion of the Aggregate Price (as defined in the Warrant) to be applied
toward the purchase of Common Stock pursuant to this Notice of Exercise is
$__________ , thereby leaving a remainder Aggregate Price (if any) equal to
$___________ . Such exercise shall be pursuant to the net issue exercise
provisions of Section 2.2 of the Warrant; therefore, Holder makes no payment
with this Notice of Exercise. The number of shares to be issued pursuant to this
exercise shall be determined by reference to the formula in Section 2.2 of the
Warrant which, by reference to Section 2.3, requires the use of the current per
share fair market value of the Company's Common Stock. The current fair market
value of one share of the Company's Common Stock shall be determined in the
manner provided in Section 2.3, which amount has been determined or agreed to by
Holder and the Company to be $___________ , which figure is acceptable to Holder
for calculations of the number of shares of Common Stock issuable pursuant to
this Notice of Exercise [SPECIFY ANY ALTERNATIVE ARRANGEMENTS TO THE FOREGOING,
IF NECESSARY OR APPLICABLE]. Holder requests that the certificates for the
purchased shares of Common Stock be issued in the name of and delivered to
"___________________________", ______________________. To the extent the
foregoing exercise is for less than the full Aggregate Price of the Warrant, a
replacement Warrant representing the remainder of the Aggregate Price (and
otherwise of like form, tenor and effect) shall be delivered to Holder along
with the share certificate evidencing the Common Stock issued in response to
this Notice of Exercise.

                                             By:
                                                 ------------------------------
                                                            [NAME]

                                      NOTE

     The execution to the foregoing Notice of Exercise must exactly correspond
to the name of the Holder on the Warrant.