The University of Minnesota-Morris women's wrestling team has been invitied to perform on the Main Stage at the 2002 Minnesota State Fair.    The seven-time national championship team will perform at 2:00 pm on Saturday, August 31st and again on Sunday, September 1st at 10:00 am on the Main Stage.    The UMM wrestlers will wrestle some exhibition matches, explain scoring of Olympic freestyle wrestling, and demonstrate different scoring maneauvers and throws.  Women's freestyle wrestling will be an official sport in the 2004 Olympic Games in Athens, Greece.    The Cougar women will also be handing out and signing autographs on the 2002-2003 schedule poster that will be available for the first time at the State Fair.