EX-99 6 a8-2ex99_24.txt EXHIBIT 99.24 Page 121 of 123 Exhibit 99.24 JOINT FILING AGREEMENT The undersigned hereby agree that any Statement on Schedule 13D to be filed with the Securities and Exchange Commission by any of the undersigned, including any amendment thereto, with respect to the securities of Greenbriar Corporation may be filed by any of the undersigned as a joint filing of all of the undersigned. This Joint Filing Agreement shall be filed as an Exhibit to such statement. Date: August 2, 2001 LSOF POOLED EQUITY, L.P. By: LSOF GenPar, Inc., its General Partner By:/s/ J.D. Dell ------------------------------------------ J.D. Dell Vice President Date: August 2, 2001 LSOF GENPAR, INC. By:/s/ J.D. Dell ------------------------------------------ J.D. Dell Vice President Date: August 2, 2001 LONE STAR OPPORTUNITY FUND, L.P. By: Lone Star Partner, L.P., its General Partner By: Lone Star Management Co., Ltd., its General Partner By:/s/ J.D. Dell ----------------------------- J.D. Dell Vice President Page 122 of 123 Date: August 2, 2001 LONE STAR PARTNER, L.P. By: Lone Star Management Co., Ltd., its General Partner By:/s/ J.D. Dell ----------------------------------- J.D. Dell Vice President Date: August 2, 2001 LONE STAR MANAGEMENT CO., LTD. By:/s/ J.D. Dell ------------------------------------------ J.D. Dell Vice President Date: August 2, 2001 HUDSON ADVISORS, L.L.C. By:/s/ Steven R. Shearer ------------------------------------------ Steven R. Shearer Vice President Date: August 2, 2001 TERLINGUA ADVISORS, INC. By:/s/ Steven R. Shearer ------------------------------------------ Steven R. Shearer Vice President Date: August 2, 2001 ADVISORS GENPAR, INC. By:/s/ J.D. Dell ------------------------------------------ J.D. Dell Vice President Page 123 of 123 Date: August 2, 2001 HUDSON ADVISORS ASSOCIATES, L.P. By: Advisors GenPar, Inc. its General Partner By:/s/ J.D. Dell ----------------------------------- J.D. Dell Vice President Date: August 2, 2001 /s/ John P. Grayken --------------------------------------------- John P. Grayken