Exhibit 10.20 AMENDMENT NO. 2 TO SERIES E PREFERRED STOCK PURCHASE AGREEMENT -------------------------------------------------------------- This Amendment No. 2 (the "Amendment") to that certain Series E Preferred Stock Purchase Agreement (the "Original Agreement") dated as of February 22, 1996 by and among Production Group International, Inc., a Virginia corporation (the "Company"), and the investors listed on Schedule A thereto, each of which is herein referred to as a "Prior Series E Investor" and collectively as the "Prior Series E Investors," as amended by that certain Amendment No. 1 to the Original Agreement dated as of June 19, 1996, is made as of September 26, 1996 (the "Effective Date") by and among the Company and the Prior Series E Investors that have executed this Amendment (collectively, the "Amending Investors"). Capitalized terms not otherwise defined in this Amendment shall have the meaning set forth in the Original Agreement. WHEREAS, the Amending Investors hold a majority of the Common Stock issued or issuable upon conversion of the Series E Preferred Stock; and WHEREAS, the Company and the Amending Investors desire to amend the Original Agreement. THE PARTIES HEREBY AGREE AS FOLLOWS: 1. Section 1.5, which currently reads as follows: "1.5 Additional Investors and Subscription Amounts. The Company --------------------------------------------- may, until June 30, 1996, either add new parties to this Agreement, or agree with an Investor to increase the number of shares of Series E Preferred Stock set forth opposite such Investor's name, provided, that (a) in the event a new party is added to this Agreement, such new party executes signature pages to this Agreement and the other agreements referenced herein, and is subject to the terms and conditions of this Agreement and the other agreements referenced herein and shall be deemed an "Investor" for purposes of this Agreement; (b) in the event the number of shares of Series E Preferred Stock for an Investor is increased, the Company and such Investor both execute a written document documenting such increase, (c) in either event, Schedule A is amended accordingly; (c) in either event, the Company promptly notifies each Investor of such new party or parties or such increase for an existing Investor and concurrently distributes an amended Schedule A; and (d) the aggregate amount of shares of Series E Preferred Stock set forth on Schedule A and available to be sold pursuant to this Agreement does not exceed 1,796,407 shares." shall be amended in its entirety to read as follows: "1.5 Additional Investors and Subscription Amounts. The Company --------------------------------------------- may, until December 31, 1996, either add new parties to this Agreement, or agree with an Investor to increase the number of shares of Series E Preferred Stock set forth opposite such Investor's name, provided, that (a) in the event a new party is added to this Agreement, such new party executes signature pages to this Agreement and the other agreements referenced herein, and is subject to the terms and conditions of this Agreement and the other agreements referenced herein and shall be deemed an "Investor" for purposes of this Agreement; (b) in the event the number of shares of Series E Preferred Stock for an Investor is increased, the Company and such Investor both execute a written document documenting such increase, (c) in either event, Schedule A is amended accordingly; (c) in either event, the Company promptly notifies each Investor of such new party or parties or such increase for an existing Investor and concurrently distributes an amended Schedule A; and (d) the aggregate amount of shares of Series E Preferred Stock set forth on Schedule A and available to be sold pursuant to this Agreement does not exceed 1,796,407 shares." 2. Schedule A to the Original Agreement is hereby amended in its entirety as of the date hereof to read as set forth in Schedule A attached hereto. 3. Except as specifically provided herein, the Original Agreement shall remain in full force and effect. [REST OF PAGE LEFT INTENTIONALLY BLANK] -2- IN WITNESS WHEREOF, the parties have executed this Amendment No. 1 as of the Effective Date. PRODUCTION GROUP INTERNATIONAL, INC. By: --------------------------------- Mark N. Sirangelo, President Address: One Courthouse Metro Suite 200 2200 Wilson Boulevard Arlington, Virginia 22201 SIGNATURE PAGE TO AMENDMENT NO. 2 TO SERIES E PREFERRED STOCK PURCHASE AGREEMENT SIERRA VENTURES IV, a California Limited Partnership By its General Partner, SV ASSOCIATES IV, L.P., a California Limited Partnership By: ---------------------------------- Peter C. Wendell General Partner Address: 3000 Sand Hill Road, Bldg 4, Suite 210 Menlo Park, California 94025 SIERRA VENTURES IV INTERNATIONAL, a California Limited Partnership By its General Partner, SV ASSOCIATES IV, L.P., a California Limited Partnership By: ---------------------------------- Peter C. Wendell General Partner Address: 3000 Sand Hill Road, Bldg 4, Suite 210 Menlo Park, California 94025 SIGNATURE PAGE TO AMENDMENT NO. 2 TO SERIES E PREFERRED STOCK PURCHASE AGREEMENT MELLON BANK, N.A., solely in its capacity as Trustee for the First Plaza Group Trust (as directed by General Motors Investment Management Corporation), and not in its individual capacity By: ---------------------------------- Name: -------------------------------- Title: ------------------------------- Address: One Mellon Bank Center Pittsburgh, PA 15258-0001 SIGNATURE PAGE TO AMENDMENT NO. 2 TO SERIES E PREFERRED STOCK PURCHASE AGREEMENT WLD/LAMONT PARTNERS By: ------------------------------- Douglas S. Luke General Partner Address: One E. Broward Blvd. Suite 1101 Ft. Lauderdale, FL 33301 SIGNATURE PAGE TO AMENDMENT NO. 2 TO SERIES E PREFERRED STOCK PURCHASE AGREEMENT SCHEDULE A SCHEDULE OF INVESTORS Series E Preferred Stock ------------------------ Number of Shares of Series E Name and Address Preferred Stock ---------------- --------------- Mellon Bank, N.A., as Trustee 479,042 for First Plaza Group Trust Sierra Ventures IV, L.P. 201,511 Sierra Ventures IV International 8,069 Merifin Capital N.V. 119,760 Orchid & Co. 59,880 Trident Capital 49,991 Partners Fund-I, L.P. Trident Capital 9,889 Partners Fund-I, C.V. Michael P. Galvin 1994 Trust 59,880 Mercury Partners, LLC 59,880 Frederic C. Hamilton 59,880 WLD/Lamont Partners 633,474 ABS Employees' Venture Fund, L.P. 55,151 TOTAL 1,796,407 -7-