<PAGE>

                                                                   Exhibit 10.15

                              MANAGEMENT AGREEMENT

      THIS MANAGEMENT AGREEMENT (this "Agreement") is made as of March 11, 2004,
between VI Acquisition Corp., a Delaware corporation (the "Company"), and Walter
van Benthuysen (the "Director").

      The Company and Director desire to enter into an agreement pursuant to
which Director will commit to purchase, and the Company will commit to sell, an
aggregate of 10,000 shares of the Company's Common Stock, par value $.0001 per
share (the "Common Stock"). All of such shares of Common Stock are referred to
herein as "Director Shares." Certain definitions are set forth in Section 7 of
this Agreement.

      The parties hereto agree as follows:

      1. Director Shares.

      (a) Upon execution of this Agreement, Director will purchase, and the
Company will sell, 10,000 shares of Common Stock at a price of $1.00 per share,
the fair market value of the Common Stock on the date hereof. The Company will
deliver to Director the certificates representing such Director Shares, and
Director will deliver to the Company a cashier's or certified check or wire
transfer of funds in the aggregate amount of $10,000.

      (b) Within thirty (30) days after each purchase by Director of Director
Shares pursuant to this Agreement, Director will make an effective election with
the Internal Revenue Service under Section 83(b) of the Internal Revenue Code
and the regulations promulgated thereunder in the form of Exhibit A attached
hereto.

      (c) In connection with the purchase and sale of the Director Shares
pursuant hereto, Director represents and warrants to the Company that:

            (i) The Director Shares to be acquired by Director pursuant to this
      Agreement will be acquired for Director's own account and not with a view
      to, or intention of, distribution thereof in violation of the Securities
      Act, or any applicable state securities laws, and the Director Shares will
      not be disposed of in contravention of the Securities Act or any
      applicable state securities laws;

            (ii) Director is an outside director of the Company, is
      sophisticated in financial matters and is able to evaluate the risks and
      benefits of the investment in the Director Shares;

            (iii) Director is able to bear the economic risk of his investment
      in the Director Shares for an indefinite period of time because the
      Director Shares have not been registered under the Securities Act and,
      therefore, cannot be sold unless subsequently registered under the
      Securities Act or an exemption from such registration is available;

<PAGE>

            (iv) Director has had an opportunity to ask questions and receive
      answers concerning the terms and conditions of the offering of the
      Director Shares and has had full access to such other information
      concerning the Company as he has requested;

            (v) This Agreement and each of the other agreements contemplated
      hereby to which Director is a party constitute legal, valid and binding
      obligations of Director, enforceable in accordance with their terms, and
      the execution, delivery and performance of this Agreement and such other
      agreements by Director does not and will not conflict with, violate or
      cause a breach of any agreement, contract or instrument to which Director
      is a party or any judgment, order or decree to which Director is subject;

            (vi) Director is not a party to or bound by any employment
      agreement, consulting agreement, noncompete agreement or confidentiality
      agreement which conflicts with the obligations set forth in this
      Agreement; and

            (vii) Director is a resident of the State of Illinois.

      (d) As an inducement for the Company to commit to issue the Director
Shares to Director, and as a condition thereto, Director acknowledges and agrees
that neither any future issuance of capital stock of the Company to Director nor
any provision contained herein shall entitle Director to remain in the service
of the Company, or any Subsidiary of the Company, or affect the right of the
Company or any Subsidiary to terminate Director's services at any time for any
reason.

      2. Vesting of Shares.

      (a) Except as otherwise provided in Section 2(b) below, the Director
Shares purchased hereunder will become vested in accordance with the following
schedule, if as of each such date Director is still serving as a director of the
Company or is otherwise engaged to perform services on behalf of the Company or
any Subsidiary of the Company:

<TABLE>
<CAPTION>
                                                    CUMULATIVE PERCENTAGE OF
             DATE                                 DIRECTOR SHARES TO BE VESTED
             ----                                 ----------------------------
<S>                                               <C>
1st Anniversary of this Agreement                             20%
2nd Anniversary of this Agreement                             40%
3rd Anniversary of this Agreement                             60%
4th Anniversary of this Agreement                             80%
5th Anniversary of this Agreement                             100%
</TABLE>

      (b) Notwithstanding the foregoing or anything herein to the contrary, upon
the occurrence of a Sale of the Company, all Director Shares which have not yet
become vested shall become vested at the time of such Sale of the Company (such
portion being referred to herein as the "Accelerated Shares"); provided,
however, and subject to and unless otherwise provided for under the Stockholders
Agreement by and among the Company, the Investors, the Director and certain
other parties, that Director shall not Transfer any interest in any Accelerated
Shares unless and until such time as the Investors shall have received cash
dividends or other cash

                                       2
<PAGE>

proceeds resulting from any distributions on or dispositions of any Preferred
Stock or Common Stock in an aggregate amount equal to the product of (i) two
(2), multiplied by (ii) the aggregate purchase price paid by the Investors to
the Company for all Preferred Stock, Common Stock and other equity interests of
the Company purchased by the Investors (but not in any event including amounts
committed but not yet contributed to the capital of the Company). Director
Shares which have become vested hereunder are referred to herein as "Vested
Shares," and all other Director Shares are referred to herein as "Unvested
Shares."

      (c) The Director Securities shall at all times be subject to such
restrictions or limitations with respect to the Transfer thereof that may be
contained herein or in the Stockholders Agreement or as otherwise provided by
law.

      3. Repurchase Option.

      (a) In the event Director ceases to be a director of the Company or to
otherwise be engaged by the Company or any Subsidiary for any reason (a
"Separation"), the Shares and all other Director Securities (whether held by
Director or one or more of Director's transferees, other than the Company and
the Investors) will be subject to repurchase, in each case by the Company
pursuant to the terms and conditions set forth in this Section 3 (the
"Repurchase Option").

      (b) In the event of a Separation, the Director Shares purchased hereunder
shall be subject to repurchase as follows: (i) the purchase price for each
Unvested Share of Common Stock will be the Director's Original Cost for such
share; and (ii) the purchase price for each Vested Share of Common Stock will be
the Fair Market Value for such share.

      (c) In the event of a Separation, any other Director Securities not
otherwise described in Section 3(b) above, shall be subject to repurchase as
follows: (i) the purchase price for each share of Common Stock will be the Fair
Market Value for such share and (ii) the purchase price for each share of
Preferred Stock will be Director's Original Cost for such share.

      (d) In the event of a Separation, the Company may elect to purchase all or
any portion of the Director Securities by delivering written notice (the
"Repurchase Notice") to the holder or holders of the Director Securities within
60 days after the Separation. The Repurchase Notice will set forth the number of
Unvested Shares and Vested Shares to be acquired from each holder, the aggregate
consideration to be paid for such securities and the time and place for the
closing of the transaction. The number of each type of securities to be
repurchased by the Company shall first be satisfied to the extent possible from
the Director Securities held by Director at the time of delivery of the
Repurchase Notice. If the number of any or all types of Director Securities then
held by Director is less than the total number of such securities which the
Company has elected to purchase, the Company shall purchase the remaining
securities elected to be purchased from the other holder(s) of Director
Securities under this Agreement, pro rata according to the number of the
applicable type of Director Securities held by such other holder(s) at the time
of delivery of such Repurchase Notice (determined as nearly as practicable to
the nearest share). The number of Unvested Shares and Vested Shares to be
repurchased hereunder will be allocated among Director and the other holders of
Director Securities (if any) pro rata

                                       3
<PAGE>

according to the number of the applicable type of Director Securities to be
purchased from such Person.

      (e) The closing of the purchase of the Director Securities pursuant to the
Repurchase Option shall take place on the date designated by the Company in the
Repurchase Notice, which date shall not be more than 2 months nor less than 5
days after the delivery of such notice. The Company will pay for the Director
Securities to be purchased by it pursuant to the Repurchase Option by first
offsetting amounts outstanding under any bona fide debts owed by Director to the
Company, and will pay the remainder of the purchase price to the extent
reasonably permissible under the Company's and its Subsidiaries' equity
financing agreements and agreements evidencing indebtedness for borrowed money
and to the extent the Company has the financial wherewithal at the time to make
such payments, by a check or wire transfer of funds and, if not, by a
subordinate note or notes, each on terms acceptable to banks and other financial
institutions loaning money to the Company and its Subsidiaries, payable in up to
three substantially equal, semi-annual installments beginning on the six month
anniversary of the closing of such purchase and bearing interest (payable
quarterly) at a rate per annum equal to the prime rate as published in The Wall
Street Journal from time to time, in the aggregate amount of the purchase price
for such securities. The Company will be entitled to receive customary
representations and warranties from the sellers of Director Securities
(including representations and warranties regarding good title to the Director
Securities, the absence of any liens on such title or other encumbrances with
respect to the Transfer of the Director Securities and the ability of such
sellers to consummate the sale).

      (f) Notwithstanding anything to the contrary contained in this Agreement,
all repurchases of Director Securities by the Company shall be subject to
applicable restrictions contained in the Delaware General Corporation Law and as
may be required by other parties in the Company's or any Subsidiaries' equity
financing agreements and agreements evidencing indebtedness for borrowed money,
if any. If any such restrictions prohibit the repurchase of Director Securities
hereunder which the Company is otherwise entitled or required to make, the
Company may make such repurchases as soon as it is permitted to do so under such
restrictions.

      (g) Notwithstanding anything to the contrary contained in this Agreement,
if Director delivers the notice of objection described in the definition of Fair
Market Value, or if the Fair Market Value of a Share is otherwise determined to
be an amount more than 10% greater than the per share repurchase price for such
Shares originally determined by the Board, the Company shall have the right to
revoke its exercise of the Repurchase Option for all or any portion of the
Shares elected to be repurchased by it by delivering notice of such revocation
in writing to the holders of the Shares during (i) the thirty-day period
beginning on the date the Company receives Director's written notice of
objection and (ii) the thirty-day period beginning on the date the Company is
given written notice that the Fair Market Value of a Share was finally
determined to be an amount more than 10% greater than the per share repurchase
price for such Shares originally determined by the Board.

      4. Restrictions on Transfer of Director Securities.

      (a) Transfer of Director Securities. Director shall not Transfer any
interest in any Director Securities, except at such time as the restrictions
herein terminate as provided in Section

                                       4
<PAGE>

4(b) below. Notwithstanding the foregoing, the restrictions contained in this
Section 4 will not apply with respect to (i) Transfers of shares of Director
Securities pursuant to applicable laws of descent and distribution or (ii)
Transfer of shares of Director Securities among Director's Family Group;
provided that in each case such restrictions will continue to be applicable to
the Director Securities irrespective of any such Transfer. Any transferee of
Director Securities pursuant to a Transfer in accordance with the provisions of
this Section 4(a) is herein referred to as a "Permitted Transferee."

      (b) Termination of Restrictions. The restrictions on the Transfer of
Director Securities set forth in this Section 4 will continue with respect to
each Director Security until the earlier of (i) a Qualified Public Offering; or
(ii) a Sale of the Company.

      5. Registration. Director understands that the Shares are not currently
being registered under the Securities Act by reason of their contemplated
issuance in a transaction exempt from the registration and prospectus delivery
requirements of the Securities Act pursuant to Rule 701 thereof. Director
further agrees that he will not sell or otherwise dispose of the Shares unless
such sale or other disposition has been registered or is exempt from
registration under the Securities Act and has been registered or qualified or is
exempt from registration or qualification under applicable securities laws of
any state. Director understands that a restrictive legend consistent with the
foregoing, and as set forth in Section 6, will be placed on the certificates
evidencing the Shares, and related stop transfer instructions will be noted in
the stock transfer records of the Company and/or its stock transfer agent for
the Shares.

      6. Additional Restrictions on Transfer of Director Securities.

      (a) Legend. The certificates representing the Director Securities will
bear a legend in substantially the following form:

      "THE SECURITIES REPRESENTED BY THIS CERTIFICATE WERE ORIGINALLY ISSUED AS
      OF MARCH 11, 2004, HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
      1933, AS AMENDED (THE "ACT"), AND MAY NOT BE SOLD OR TRANSFERRED IN THE
      ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER THE ACT OR AN
      EXEMPTION FROM REGISTRATION THEREUNDER. THE SECURITIES REPRESENTED BY THIS
      CERTIFICATE ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER,
      CERTAIN REPURCHASE OPTIONS AND CERTAIN OTHER AGREEMENTS SET FORTH IN A
      MANAGEMENT AGREEMENT BETWEEN THE COMPANY AND A DIRECTOR OF THE COMPANY
      DATED AS OF MARCH 11, 2004. A COPY OF SUCH AGREEMENT MAY BE OBTAINED BY
      THE HOLDER HEREOF AT THE COMPANY'S PRINCIPAL PLACE OF BUSINESS WITHOUT
      CHARGE."

      (b) Opinion of Counsel. No holder of Director Securities may transfer any
Director Securities (except pursuant to an effective registration statement
under the Securities Act) without first delivering to the Company an opinion of
counsel (reasonably acceptable in form

                                       5
<PAGE>

and substance to the Company) that neither registration nor qualification under
the Securities Act and applicable state securities laws is required in
connection with such Transfer.

      7. Definitions.

      "Affiliate" of the Investors means any direct or indirect general or
limited partner or member of an Investor, as applicable, or any employee or
owner thereof, or any other person, entity or investment fund controlling,
controlled by or under common control with an Investor.

      "Director's Family Group" means Director's spouse and descendants (whether
natural or adopted), any trust solely for the benefit of Director and/or
Director's spouse and/or descendants and any retirement plan for the Director.

      "Director Securities" means the Shares and any other securities of the
Company held by Director or any of Director's transferees permitted hereunder.
All Director Securities will continue to be Director Securities in the hands of
any holder other than Director (except for the Company, the Investors and the
Investors' Affiliates and except for transferees in a Public Sale). Except as
otherwise provided herein, each such other holder of Director Securities will
succeed to all rights and obligations attributable to Director as a holder of
Director Securities hereunder. Director Securities will also include shares of
the Company's capital stock or other securities of the Company issued with
respect to Director Securities by way of a stock split, dividend or other
recapitalization or reclassification.

      "Fair Market Value" of each Share as of a relevant date means the average
of the closing prices of the sales of the Common Stock on all securities
exchanges on which such Common Stock may at the time be listed on that date, or,
if there have been no sales or exchange on which the Common Stock is listed on
any day, the average of the highest bid and lowest asked prices on all
nationally-recognized exchanges at the end of such day, or, if on any day such
Common Stock is not so listed, the average of the representative bid and asked
prices quoted in the NASDAQ System as of 4:00 P.M., New York time, or, if on any
day such Common Stock is not quoted in the NASDAQ System, of the average of the
highest bid and lowest asked prices on such day in the domestic over-the-counter
market as reported by the National Quotation Bureau Incorporated, or any similar
successor organization, in each such case averaged over a period of 21 days
consisting of the day as of which the Fair Market Value is being determined and
the 20 consecutive business days prior to such day. If at any time such Common
Stock is not listed on any securities exchange or quoted in the NASDAQ System or
the over-the-counter market, the Fair Market Value will be the fair value of
such Common Stock determined in good faith by the Board of Directors of the
Company (the "Board Calculation"). If the Director disagrees with the Board
Calculation, the Director may, within 30 days after receipt of the Board
Calculation, deliver a notice (an "Objection Notice") to the Company setting
forth the Director's calculation of Fair Market Value. The Board and the
Director will negotiate in good faith to agree on such Fair Market Value, but if
such agreement is not reached within 30 days after the Company has received the
Objection Notice, Fair Market Value shall be determined by an appraiser selected
by the Board, which appraiser shall submit to the Board and the Director a
report within 30 days of its engagement setting forth such determination. The
determination of such appraiser shall be final and binding upon all parties. If
the Repurchase Option is exercised within 45 days after a Separation, then Fair
Market Value shall be determined as of the date of such Separation;

                                       6
<PAGE>

thereafter, Fair Market Value shall be determined as of the date the Repurchase
Option is exercised. A comparable process will be employed to determine the Fair
Market Value of Preferred Stock.

      "Investors" has the meaning set forth in the Stockholders Agreement.

      "Original Cost" means, (i) with respect to each share of Common Stock
purchased hereunder, $1.00 (as proportionately adjusted for all subsequent stock
splits, stock dividends and other recapitalizations) and (ii) with respect to
each share of Preferred Stock purchased under the Purchase Agreement, $1,000.00
plus all accrued and unpaid dividends of the Preferred Stock (as proportionately
adjusted for all subsequent stock splits, stock dividends and other
recapitalizations).

      "Person" means an individual, a partnership, a limited liability company,
a corporation, an association, a joint stock company, a trust, a joint venture,
an unincorporated organization and a governmental entity or any department,
agency or political subdivision thereof.

      "Preferred Stock" means preferred stock issued by the Company.

      "Public Sale" means any sale pursuant to a registered public offering
under the Securities Act or any sale to the public pursuant to Rule 144
promulgated under the Securities Act effected through a broker, dealer or market
maker.

      "Qualified Public Offering" means the sale in an underwritten public
offering registered under the Securities Act of shares of the Company's Common
Stock approved by the Board of Directors pursuant to which the Investors have
realized in cash a return of two or more times the amount of their investment in
the Company.

      "Sale of the Company" means any transaction or series of transactions
pursuant to which (A) any Person(s) other than the Investors and their
respective Affiliates in the aggregate acquire(s) (i) capital stock of the
Company possessing the voting power (other than voting rights accruing only in
the event of a default, breach or event of noncompliance) to elect a majority of
the Company's board of directors (whether by merger, consolidation,
reorganization, combination, sale or transfer of the Company's capital stock,
shareholder or voting agreement, proxy, power of attorney or otherwise) or (ii)
all or substantially all of the Company's assets determined on a consolidated
basis; provided that the term "Sale of the Company" shall not include any sale
of equity or debt securities by the Company in a private offering to other
investors selected by the Investors; or (B) more than 50% of the assets of the
Company (treating investments in Affiliates as assets for these purposes) is
spun off, split off or otherwise distributed.

      "Securities Act" means the Securities Act of 1933, as amended from time to
time.

      "Stockholders Agreement" means that certain Stockholders Agreement dated
June 13, 2003 among the Company, the Investors, the Director and certain other
parties.

                                       7
<PAGE>

      "Subsidiary" means any entity of which the Company owns securities having
a majority of the ordinary voting power in electing the board of directors, or
the equivalent governing body, directly or through one or more subsidiaries.

      "Transfer" means to sell, transfer, assign, pledge or otherwise dispose of
(whether with or without consideration and whether voluntarily or involuntarily
or by operation of law).

      8. Notices. Any notice, consent, waiver and other communications required
or permitted pursuant to the provisions of this Agreement must be in writing and
will be deemed to have been properly given (a) when delivered by hand; (b) when
sent by telecopier (with acknowledgement of complete transmission), provided
that a copy is mailed by U.S. certified mail, return receipt requested; (c)
three (3) days after sent by certified mail, return receipt requested; or (d)
one (1) day after deposit with a nationally recognized overnight delivery
service, in each case to the appropriate addresses and telecopier numbers set
forth below:

      If to the Company:

      VI Acquisition Corp.
      c/o Wind Point Partners
      Suite 3700
      676 North Michigan Avenue
      Chicago, Illinois   60611
      Attn:    Michael Solot
      Tel:     (312) 255-4800
      Fax:     (312) 255-4820

      If to the Director

      Walter van Benthuysen
      17 Tartan Lakes Court
      Westmont, Illinois  60559

      with a copy to:

      Sachnoff & Weaver, Ltd.
      30 South Wacker Drive
      Suite 2900
      Chicago, Illinois   60606
      Fax:     (312) 207-6400
      Tel:     (312) 207-1000
      Attn:  Seth M. Hemming, Esq.

Each party will be entitled to specify a different address for the receipt of
subsequent notices by giving written notice thereof to the other party in
accordance with this Section 8.

      9. General Provisions.

      (a) Transfers in Violation of Agreement. Any Transfer or attempted
Transfer of any Director Securities in violation of any provision of this
Agreement shall be void, and the

                                       8
<PAGE>

Company shall not record such Transfer on its books or treat any purported
transferee of such Director Securities as the owner of such securities for any
purpose.

      (b) Severability. Whenever possible, each provision of this Agreement will
be interpreted in such manner as to be effective and valid under applicable law,
but if any provision of this Agreement is held to be invalid, illegal or
unenforceable in any respect under any applicable law or rule in any
jurisdiction, such invalidity, illegality or unenforceability will not affect
any other provision or any other jurisdiction, but this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision had never been contained herein.

      (c) Complete Agreement. This Agreement, those documents expressly referred
to herein and other documents of even date herewith embody the complete
agreement and understanding among the parties and supersede and preempt any
prior understandings, agreements or representations by or among the parties,
written or oral, which may have related to the subject matter hereof in any way.
Director hereby releases the Company and its affiliates and its and their
predecessors from any obligation or liability the Company or any of its
affiliates or its or their predecessors owes or owed to Director or any of his
affiliates and related persons prior to the date hereof.

      (d) Counterparts. This Agreement may be executed in separate counterparts,
each of which is deemed to be an original and all of which taken together
constitute one and the same agreement.

      (e) Successors and Assigns.

            (i) All Director Securities will continue to be Director Securities
      in the hands of any holder other than Director, including any of
      Director's transferees permitted hereunder or under the Stockholders
      Agreement (except for the Company, the Investors and the Investors'
      Affiliates and except for transferees in a Public Sale). Except as
      otherwise provided herein, each such other holder of Director Securities
      will succeed to all rights and obligations attributable to Director as a
      holder of Director Securities hereunder.

            (ii) Except as otherwise provided herein, this Agreement shall bind
      and inure to the benefit of and be enforceable by Director, the Company,
      the Investors and their respective successors and assigns (including
      subsequent holders of Director Securities); provided that the rights and
      obligations of Director under this Agreement shall not be assignable
      except in connection with a permitted transfer of Director Securities
      hereunder.

            (iii) Each of the Investors is intended to be a third party
      beneficiary of this Agreement and may enforce any rights granted to it
      hereunder.

      (f) Choice of Law. The corporate law of the State of Delaware will govern
all questions concerning the relative rights of the Company and its
stockholders. All other questions concerning the construction, validity and
interpretation of this Agreement and the exhibits hereto will be governed by and
construed in accordance with the internal laws of the State of Illinois,

                                       9
<PAGE>

without giving effect to any choice of law or conflict of law provision or rule
(whether of the State of Illinois or any other jurisdiction) that would cause
the application of the laws of any jurisdiction other than the State of
Illinois. Furthermore, Director and Company agree and consent to submit to
personal jurisdiction in the State of Illinois in any state or federal court of
competent subject matter jurisdiction situated in Cook County, Illinois.
Director and Company agree that the sole and exclusive venue for any suit
arising out of, or seeking to enforce, the terms of this Agreement shall be in a
state or federal court of competent subject matter jurisdiction situated in Cook
County, Illinois.

      (g) Remedies. Each of the parties to this Agreement (including the
Investor) will be entitled to enforce its rights under this Agreement
specifically, to recover damages and costs (including attorney's fees) caused by
any breach of any provision of this Agreement and to exercise all other rights
existing in its favor. The parties hereto agree and acknowledge that money
damages may not be an adequate remedy for any breach of the provisions of this
Agreement and that any party may in its sole discretion apply to any court of
law or equity of competent jurisdiction (without posting any bond or deposit)
for specific performance and/or other injunctive relief in order to enforce or
prevent any violations of the provisions of this Agreement.

      (h) Amendment and Waiver. The provisions of this Agreement may be amended
and waived only with the prior written consent of the Company and Director. No
cause of conduct or failure or delay in enforcing the provisions of this
Agreement shall affect the validity, binding effect or enforceability of this
Agreement.

      (i) Business Days. If any time period for giving notice or taking action
hereunder expires on a day which is a Saturday, Sunday or holiday in the state
in which the Company's chief executive office is located, the time period shall
be automatically extended to the business day immediately following such
Saturday, Sunday or holiday.

      (j) Indemnification and Reimbursement of Payments on Behalf of Director.
The Company and any Subsidiary shall be entitled to deduct or withhold from any
amounts owing from the Company or any Subsidiary to the Director any federal,
state, local or foreign withholding taxes, excise taxes, or employment taxes
("Taxes") imposed with respect to the Director's compensation or other payments
from the Company or any Subsidiary or the Director's ownership interest in the
Company, including, but not limited to, wages, bonuses, dividends, the receipt
or exercise of stock options and/or the receipt or vesting of restricted stock.
The Director shall indemnify the Company and any Subsidiary for any amounts paid
with respect to any such Taxes, together with any interest, penalties and
related expenses thereto.

      (k) Termination. This Agreement shall survive the termination of
Director's services with the Company or any Subsidiary and shall remain in full
force and effect after such termination.

      (l) Generally Accepted Accounting Principles; Adjustments of Numbers.
Where any accounting determination or calculation is required to be made under
this Agreement or the exhibits hereto, such determination or calculation (unless
otherwise provided) shall be made in accordance with United States generally
accepted accounting principles, consistently applied.

                                       10
<PAGE>

All numbers set forth herein which refer to share prices or amounts will be
appropriately adjusted to reflect stock splits, stock dividends, combinations of
shares, recapitalizations or other similar transactions affecting the subject
class of stock.

      (m) Waiver of Jury Trial. Each of the parties hereto hereby irrevocably
waives any and all right to trial by jury of any claim or cause of action in any
legal proceeding arising out of or related to this Agreement or the transactions
or events contemplated hereby or any course of conduct, course of dealing,
statements (whether verbal or written) or actions of any party hereto. The
parties hereto each agree that any and all such claims and causes of action
shall be tried by a court trial without a jury. Each of the parties hereto
further waives any right to seek to consolidate any such legal proceeding in
which a jury trial has been waived with any other legal proceeding in which a
jury trial cannot or has not been waived.

                                    * * * * *

IN WITNESS WHEREOF, the parties hereto have executed this Management Agreement
as of the date first written above.

                                         VI ACQUISITION CORP.

                                         By:  /s/ Debra Koenig
                                              ----------------------
                                         Name: Debra Koenig
                                         Its:  Executive Vice President

                                             /s/ Walter Van Benthuysen
                                         -----------------------------
                                         WALTER VAN BENTHUYSEN


                                       11
<PAGE>

                          ELECTION TO INCLUDE VALUE OF
                       RESTRICTED PROPERTY IN GROSS INCOME
                  IN YEAR OF TRANSFER UNDER CODE SECTION 83(b)

      The undersigned (the "TAXPAYER") hereby elects pursuant to Section 83(b)
of the Internal Revenue Code to include the restricted property described below
in his gross income for the tax year ending December 31, 2004 and supplies the
following information in accordance with the regulations promulgated thereunder:

1. THE NAME, ADDRESS AND TAXPAYER IDENTIFICATION NUMBER OF THE TAXPAYER ARE:

                                    Walter van Benthuysen
                                    17 Tartan Lakes Court
                                    Westmont, Illinois  60559
                                    Social Security # _______________

2. DESCRIPTION OF PROPERTY WITH RESPECT TO WHICH THE ELECTION IS BEING MADE:

      10,000 shares (the "SHARES") of Common Stock, par value $0.0001 per share,
      of VI Acquisition Corp., a Delaware corporation (the "COMPANY").

3. THE DATE ON WHICH PROPERTY WAS TRANSFERRED IS MARCH 11, 2004.

      The taxable year to which this election relates is calendar year 2004.

4. THE NATURE OF THE RESTRICTION(S) TO WHICH THE PROPERTY IS SUBJECT IS:

      A. The Shares are not transferable except as permitted by a Management
Agreement. Transferees are generally subject to the same restrictions as are
imposed on their transferors. Certificates representing the Shares contain
legends to give notice of restrictions on transfer.

      B. If the Taxpayer ceases to serve as a director or other service provider
of the Company prior to certain specified time periods (the last day of each
such period, a "VESTING DATE"), a portion of the Shares will be subject to
repurchase by the Company at the amount the Taxpayer paid for the Shares (the
"PURCHASE PRICE"). On each specified Vesting Date, a portion of the Shares
subject to repurchase at the Purchase Price will lapse and such portion will
then be repurchasable at its fair market value in the event the Taxpayer ceases
to serve as a director or other service provided of the Company. On the February
20, 2009 Vesting Date, all Shares then will be repurchasable at their fair
market value in the event the Taxpayer ceases to serve as a director or other
service provider of the Company.

5. FAIR MARKET VALUE:

      The fair market value at time of transfer (determined without regard to
any restrictions other than restrictions which by their terms will never lapse)
of the property with respect to which this election is being made is $1.00 per
Share.

<PAGE>

6. AMOUNT PAID FOR PROPERTY:

      The amount paid by Taxpayer for said property is $1.00 per Share.

7. FURNISHING STATEMENT TO EMPLOYER:

      A copy of this statement has been furnished to the Company.

Dated: March 11, 2004

                                            ____________________________________
                                            Walter van Benthuysen

This election must be filed with the Internal Revenue Service Center with which
the Taxpayer files his or her Federal income tax returns and must be filed
within thirty (30) days after the date of purchase. This filing should be made
by registered or certified mail, return receipt requested. The taxpayer must
retain two copies of the completed form for filing with his or her Federal and
State tax returns for the current tax year and an additional copy for his or her
records.

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