Document:

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                                                                   Exhibit 10.16

                             OPEN PLAN SYSTEMS, INC.
                              NON-EMPLOYEE DIRECTOR
                      NON-QUALIFIED STOCK OPTION AGREEMENT
                      ------------------------------------

          THIS AGREEMENT dated as of August 8, 2001, between Open Plan Systems,
Inc., a Virginia corporation (the "Company"), and __________________
("Optionee"), is made pursuant and subject to the provisions of the Company's
2000 Stock Option Plan for Non-Employee Directors, as amended from time to time
(the "Plan"). All terms used herein that are defined in the Plan shall have the
same meaning given them in the Plan.

          1.   Grant of Option.  Pursuant to the terms of the Plan, the Company
               ---------------
hereby grants to Optionee, subject to the terms and conditions of the Plan and
subject further to the terms and conditions herein set forth, the right and
option to purchase from the Company all or any part of an aggregate of One
Thousand (1,000) shares of the Common Stock of the Company (the "Common Stock")
at an option price per share of $0.2266. Such option is to be exercisable as
hereinafter provided.

          2.   Terms and Conditions.  This option is subject to the following
               --------------------
terms and conditions:

               (a)   Expiration Date.  The Expiration Date of this option is
                     ---------------
August 8, 2011.
               (b)   Exercise of Option.  This option shall be exercisable with
                     ------------------
respect to the total number of shares covered by this option after the
expiration of six (6) months from the granting of the option. Once this option
has become exercisable with respect to the total number of shares in accordance
with the preceding sentence, it shall continue to be exercisable with respect to
such shares until the termination of Optionee's rights hereunder pursuant to
paragraph 3, 4 and 5 or, otherwise, until the Expiration Date. A partial
exercise of this option shall not affect Optionee's right to exercise
subsequently this option with respect to the remaining shares that are
exercisable,

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subject to the six month vesting period set forth in the first sentence of this
subparagraph (b) and the conditions of the Plan and this Agreement.

               (c)   Method of Exercising and Payment for Shares.  This option
                     -------------------------------------------
may be exercised only by written notice delivered to the attention of the
Company's Secretary at the Company's principal office in Richmond, Virginia. The
written notice shall specify the number of shares being acquired pursuant to the
exercise of the option when such option is being exercised in part in accordance
with subparagraph 2(b) hereof. The exercise date shall be the date upon which
such notice is received by the Company. Such notice shall be accompanied by
payment of the option price in full for each share either in cash in United
States Dollars, or by the surrender of shares of Common Stock, or by cash
equivalent acceptable to the Company or any combination thereof having an
aggregate fair market value equal to the total option price for all the shares
being purchased.

               (d)   Cashless Exercise.  To the extent permitted by applicable
                     ------------------
laws and regulations, at the request of the Optionee, the Company will cooperate
in a "cashless exercise" in accordance with Section 7.03 of the Plan.

               (e)   Nontransferability.  This option is nontransferable except,
                     ------------------
in the event of the Optionee's death, by will or by the laws of descent and
distribution subject to the terms hereof. During Optionee's lifetime, this
option may be exercised only by Optionee.

          3.   Exercise in the Event of Death.  Subject to the six month
               ------------------------------
exercisability requirement set forth in Section 2(b) hereof, this option shall
remain exercisable with respect to any shares yet unexercised in the event that
Optionee dies prior to exercising this option in full and prior to the
Expiration Date of this option. In that event, this option may be exercised by
Optionee's estate, or

                                      -2-

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the person or persons to whom his rights under this option shall pass by will or
the laws of descent and distribution. Optionee's estate or such persons must
exercise this option with respect to the remaining shares subject to the option,
if at all, within two years of the date of Optionee's death or during the
remainder of the period preceding the Expiration Date, whichever is shorter.

          4.   Exercise in the Event of Permanent and Total Disability.  Subject
               -------------------------------------------------------
to the six month exercisability requirement set forth in Section 2(b) hereof,
this option shall remain exercisable with respect to any shares yet unexercised
if Optionee becomes permanently and totally disabled (within the meaning of
Section 22(e)(3) of the Code) while serving on the Board prior to exercising
this option in full and prior to the Expiration Date of this option. In such
event, Optionee must exercise this option with respect to the remaining shares
subject to the option, if at all, within two years of the date on which he
ceases serving on the Board due to permanent and total disability or during the
remainder of the period preceding the Expiration Date, whichever is shorter.

          5.   Exercise After Resignation, Non-Election or Other Approved
               ----------------------------------------------------------
Circumstance.  Subject to the six month exercisability requirement set forth in
------------
Section 2(b) hereof, in the event that Optionee resigns from or is not
re-elected or does not stand for re-election to the Board or in any other
circumstance approved by the Board in its sole discretion, this option shall
remain exercisable with respect to any shares yet unexercised but must be
exercised by Optionee, if at all, within two years following the date of his
resignation or cessation of service on the Board, or within the period
prescribed by the Board in an approved circumstance, or during the remainder of
the period preceding the Expiration Date, whichever is shorter.

          6.   Fractional Shares.  Fractional shares shall not be issuable
               -----------------
hereunder, and when any provision hereof may entitle Optionee to a fractional
share such fraction shall be disregarded.

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          7.   Investment Representation.  Optionee agrees that, unless such
               -------------------------
shares shall previously have been registered under the Securities Act of 1933,
(a) any shares purchased by him hereunder will be purchased for investment and
not with a view to distribution or resale, and (b) until such registration,
certificates representing such shares may bear an appropriate legend to assure
compliance with such Act. This investment representation shall terminate when
such shares have been registered under the Securities Act of 1933.

          8.   Change in Capital Structure.  Subject to any required action by
               ---------------------------
the shareholders of the Company, the number of shares of Common Stock covered by
this option, and the price per share thereof, shall be proportionately adjusted
and its terms shall be adjusted as the Committee shall determine to be equitably
required for any increase or decrease in the number of issued and outstanding
shares of Common Stock of the Company resulting from any stock dividend (but
only on the Common Stock), stock split, subdivision, combination,
reclassification, recapitalization or general issuance to holders of Common
Stock of rights to purchase Common Stock at substantially below its then fair
market value or any change in the number of such shares outstanding effected
without receipt of cash or property or labor or services by the Company or for
any spin-off, spin-out, split-up, split-off or other distribution of assets to
shareholders.

          In the event of a change in the Common Stock of the Company as
presently constituted, which is limited to a change of all of its authorized
shares with par value or without par value, the shares resulting from any such
change shall be deemed to be the Common Stock within the meaning of the Plan.

          The grant of this option pursuant to the Plan shall not affect in any
way the right or power of the Company to make adjustments, reclassifications,
reorganizations or changes of its capital or

                                      -4-

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business structure or to merge or to consolidate or to dissolve, liquidate or
sell, or transfer all or any part of its business or assets.

          9.   Governing Law.  This Agreement shall be governed by and construed
               -------------
and enforced in accordance with the laws of the Commonwealth of Virginia, except
to the extent that federal law shall be deemed to apply.

          10.  Conflicts.  In the event of any conflict between the provisions
               ---------
of the Plan as in effect on the date hereof and the provisions of this
Agreement, the provisions of the Plan shall govern.

          11.  Optionee Bound by Plan.  Optionee hereby acknowledges receipt of
               ----------------------
a copy of the Plan and agrees to be bound by all the terms and provisions
thereof.

          12.  Binding Effect.  Subject to the limitations stated above and in
               --------------
the Plan, this Agreement shall be binding upon and inure to the benefit of the
legatees, distributees, and personal representatives of Optionee and the
successors of the Company.

          13.  Counterparts.  This Agreement may be executed in one or more
               ------------
counterparts, each one of which taken together shall constitute one and the same
agreement.

                     [Signatures Appear on Following Page.]

                                      -5-

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          IN WITNESS WHEREOF, the Company has caused this Agreement to be signed
by a duly authorized officer, and Optionee has affixed his signature hereto.

OPTIONEE:                              OPEN PLAN SYSTEMS, INC.

                                       By:
-----------------------------------         ------------------------------------
[OPTIONEE]                                  Anthony F. Markel
                                            Chairman of the Board

                                      -6-

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                             OPEN PLAN SYSTEMS, INC.

 Schedule to Form of Non-Employee Director Non-Qualified Stock Option Agreements

     ---------------------------------------------------------------------
                     Optionees                     Number of Options
                     ---------                     -----------------
     ---------------------------------------------------------------------

     ---------------------------------------------------------------------
      Theodore L. Chandler, Jr.                                     1,000
     ---------------------------------------------------------------------
      J. Wesley Hall                                                1,000
     ---------------------------------------------------------------------
      Anthony F. Markel                                             1,000
     ---------------------------------------------------------------------
      Robert F. Mizell                                              1,000
     ---------------------------------------------------------------------
      Edwin W. Mugford                                              1,000
     ---------------------------------------------------------------------
      Troy A. Peery, Jr.                                            1,000
     ---------------------------------------------------------------------
      W. Sydnor Settle                                              1,000
     ---------------------------------------------------------------------

                                      -7-<PAGE>

                                                                   Exhibit 10.17

                             OPEN PLAN SYSTEMS, INC.
                                    EMPLOYEE
                      NON-QUALIFIED STOCK OPTION AGREEMENT
                      ------------------------------------

     THIS AGREEMENT dated as of the 15th day of October, 2001, between Open Plan
Systems, Inc., a Virginia corporation (the "Company"), and _________________
("Optionee"), is made pursuant and subject to the provisions of the Company's
1996 Stock Incentive Plan, as amended from time to time (the "Plan"). All terms
used herein that are defined in the Plan shall have the same meanings given them
in the Plan.

     1.   Grant of Option. Pursuant to the terms of the Plan, the Company, on
          ---------------
October 15, 2001, granted to Optionee, subject to the terms and conditions of
the Plan and subject further to the terms and conditions herein set forth, the
right and option to purchase from the Company all or any part of an aggregate of
_________ shares of the common stock of the Company (the "Common Stock") at the
option price of $0.18 per share. Such option is to be exercisable as
hereinafter provided.

     2.   Terms and Conditions. This option is subject to the following terms
          --------------------
and conditions:

          (a)  Expiration Date. The Expiration Date of this option is October
               ---------------
15, 2008.

          (b)  Exercise of Option. Except as provided in paragraphs 3, 4, 5 and
               ------------------
6 below, this option shall become exercisable with respect to twenty-five
percent (25%) of the total number of shares covered by this option, as set forth
in paragraph 1 above, on the date that is six (6) months after the date of this
Agreement and at the end of each twelve (12) month period thereafter, up to a
total of three (3) such periods, that Optionee continues to be employed by the
Company after the date of the granting of this option. Once this option has
become exercisable

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with respect to a particular number of shares in accordance with the preceding
sentence, it shall continue to be exercisable with respect to such shares until
the earlier of the termination of Optionee's rights hereunder pursuant to
paragraph 3, 4, 5 or 6, or the Expiration Date. A partial exercise of this
option shall not affect Optionee's right to exercise this option subsequently
with respect to the remaining shares that are exercisable subject to the
conditions of the Plan and this Agreement.

          (c)  Method of Exercising and Payment for Shares. This option may be
               -------------------------------------------
exercised only by written notice delivered to the attention of the Company's
Secretary at the Company's principal office in Richmond, Virginia. The written
notice shall specify the number of shares being acquired pursuant to the
exercise of the option when such option is being exercised in part in accordance
with subparagraph 2(b) hereof. The exercise date shall be the date upon which
such notice is received by the Company. Such notice shall be accompanied by
payment of the option price in full for each share either in cash in United
States Dollars, or by the surrender of shares of Common Stock to the Company or
the Company's withholding shares of Common Stock from Optionee upon exercise, or
by cash equivalent acceptable to the Company or any combination thereof having
an aggregate fair market value equal to the option price.

          (d)  Cashless Exercise. To the extent permitted by applicable laws and
               -----------------
regulations, at the request of Optionee, the Company will cooperate in a
"cashless exercise" in accordance with Section 8.05 of the Plan.

          (e)  Tax Withholding. Upon the exercise of this option or portion
               ---------------
thereof, the Company shall have the right to require Optionee to reimburse the
Company for any taxes

                                      -2-

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required by any government to be withheld or otherwise deducted and paid with
respect to such exercise and not complete the exercise of the option until the
Company is so reimbursed. At its discretion, the Company may retain and withhold
by means of cashing out a portion of such option, any such taxes required to be
withheld by the Company. In lieu thereof, the Company shall have the
unrestricted right to withhold, from any other cash amounts due (or to become
due) from the Company to Optionee, an amount equal to such taxes required to be
withheld by the company to reimburse the Company for any such taxes.

          (f)  Nontransferability. This option is nontransferable except, in the
               ------------------
event of Optionee's death, by will or by the laws of descent and distribution
subject to the terms hereof. During Optionee's lifetime, this option may be
exercised only by Optionee.

     3.   Exercise in the Event of Death. This option shall become exercisable
          ------------------------------
in full in the event that Optionee dies while employed by the Company or an
Affiliate prior to the Expiration Date of this option. In that event, this
option may be exercised by Optionee's estate, or the person or persons to whom
his rights under this option shall pass by will or the laws of descent and
distribution. Optionee's estate or such persons must exercise this option, if at
all, within two (2) years of the date of Optionee's death or during the
remainder of the period preceding the Expiration Date, whichever is shorter, but
in no event may the option be exercised prior to the expiration of six (6)
months from the date of the grant of the option.

     4.   Exercise in the Event of Permanent and Total Disability. This option
          -------------------------------------------------------
shall be exercisable in full if Optionee becomes permanently and totally
disabled (within the meaning of Section 22(e)(3) of the Code) while employed by
the Company or an Affiliate prior to the Expiration Date of this option. In such
event, Optionee must exercise this option, if at all, within

                                      -3-

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two (2) years of the date on which he or she terminates employment with the
Company due to permanent and total disability or during the remainder of the
period preceding the Expiration Date, whichever is shorter, but in no event may
the option be exercised prior to the expiration of six (6) months from the date
of the grant of the option.

     5.   Exercise After Retirement or Other Approved Circumstance. In the event
          --------------------------------------------------------
that Optionee retires from employment with the Company or in any other
circumstance approved by the Committee in its sole discretion, this option shall
become exercisable in full but must be exercised by Optionee, if at all, within
two (2) years following his retirement date, in the event of his or her
retirement, or within the period prescribed by the Committee, in an approved
circumstance, or during the remainder of the period preceding the Expiration
Date, whichever is shorter, but in no event may the option be exercised prior to
the expiration of six (6) months from the date of the grant of the option.

     6.   Exercise After Termination of Employment. In all events, other than
          ----------------------------------------
those events addressed in paragraphs 3, 4 and 5, in which Optionee ceases to be
employed by the Company or an Affiliate other than for cause, Optionee may
exercise this option, in whole or in part, with respect to that number of shares
which are exercisable under Paragraph 2(b). above at the time of the termination
of his or her employment; provided that this option must be exercised, if at
all, within ninety (90) days following the date upon which he or she ceases to
be employed by the Company or during the remainder of the period preceding the
Expiration Date, whichever is shorter, but in no event may the option be
exercised prior to the expiration of six (6) months from the date of the grant
of the option. If Optionee's employment is terminated for cause, his or her
right to exercise this option shall terminate immediately. For the purposes of
this Agreement,

                                      -4-

<PAGE>

"cause" shall mean conduct that is unprofessional, unethical, immoral or
fraudulent as determined in the sole discretion of the Compensation Committee.

     7.   Fractional Shares. Fractional shares shall not be issuable hereunder,
          -----------------
and when any provision hereof may entitle Optionee to a fractional share such
fraction shall be disregarded.

     8.   No Right to Continued Employment. This option does not confer upon
          --------------------------------
Optionee any right with respect to continuance of employment by the Company or
an Affiliate, nor shall it interfere in any way with the right of the Company or
an Affiliate to terminate Optionee's employment at any time.

     9.   Investment Representation. Optionee agrees that, unless such shares
          -------------------------
shall previously have been registered under the Securities Act of 1933, (a) any
shares purchased by him or her hereunder will be purchased for investment and
not with a view to distribution or resale, and (b) until such registration,
certificates representing such shares may bear an appropriate legend to assure
compliance with such Act. This investment representation shall terminate when
such shares have been registered under the Securities Act of 1933.

     10.  Change of Control or Capital Structure. Subject to any required action
          --------------------------------------
by the shareholders of the Company, the number of shares of Common Stock covered
by this option, and the price per share thereof, shall be proportionately
adjusted and its terms shall be adjusted as the Committee shall determine to be
equitably required for any increase or decrease in the number of issued and
outstanding shares of Common Stock of the Company resulting from any stock
dividend (but only on the Common Stock), stock split, subdivision, combination,
reclassification, recapitalization or general issuance to holders of Common
Stock of rights to

                                      -5-

<PAGE>

purchase Common Stock at substantially below its then fair market value or any
change in the number of such shares outstanding effected without receipt of cash
or property or labor or services by the Company or for any spin-off, spin-out,
split-up, split-off or other distribution of assets to shareholders.

     In the event of a Change of Control, the provisions of Section 13.03 of the
Plan shall apply to this option. In the event of a change in the Common Stock of
the Company as presently constituted, which is limited to a change of all of its
authorized shares with par value into the same number of shares with a different
par value or without par value, the shares resulting from any such change shall
be deemed to be the Common Stock within the meaning of the Plan.

     The grant of this option pursuant to the Plan shall not affect in any way
the right or power of the Company to make adjustments, reclassifications,
reorganizations or changes of its capital or business structure or to merge or
to consolidate or to dissolve, liquidate or sell, or transfer all or any part of
its business or assets.

     11.  Governing Law. This Agreement shall be governed by and construed and
          -------------
enforced in accordance with the laws of the Commonwealth of Virginia, except to
the extent that federal law shall be deemed to apply.

     12.  Conflicts. In the event of any conflict between the provisions of the
          ---------
Plan and the provisions of this Agreement, the provisions of the Plan shall
govern.

     13.  Optionee Bound by Plan. Optionee hereby acknowledges receipt of a copy
          ----------------------
of the Plan and agrees to be bound by all the terms and provisions thereof.

                                      -6-

<PAGE>

     14.  Binding Effect. Subject to the limitations stated above and in the
          --------------
Plan, this Agreement shall be binding upon and inure to the benefit of the
legatees, distributees, and personal representatives of Optionee and the
successors of the Company.

     15.  Counterparts. This Agreement may be executed in one or more
          ------------
counterparts, each one of which when so executed shall be deemed to be an
original, and all of which taken together shall constitute one and the same
agreement.

     IN WITNESS WHEREOF, the Company has caused this Agreement to be signed by a
duly authorized officer, and Optionee has affixed his signature hereto, as of
the date and year first above written.

OPTIONEE:                                  OPEN PLAN SYSTEMS, INC.

__________________________________         By:__________________________________
[OPTIONEE]                                    Thomas M. Mishoe, Jr.
                                              Chief Executive Officer

                                       -7-

<PAGE>

                             OPEN PLAN SYSTEMS, INC.

            Schedule to Form of Non-Qualified Stock Option Agreements

      --------------------------------------------------------------------
                     Optionees                     Number of Options
                     ---------                     -----------------
      --------------------------------------------------------------------

      --------------------------------------------------------------------
        Thomas M. Mishoe, Jr.                                     20,000
      --------------------------------------------------------------------
        David E. Green                                            10,000
      --------------------------------------------------------------------
        Stephen P. Hindle                                         10,000
      --------------------------------------------------------------------
        John H. Bryson, III                                        7,500
      --------------------------------------------------------------------
        Kathryn L. Tyler                                           7,500
      --------------------------------------------------------------------

                                      -8-

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