I have the INF version 2.75. Runs fine, I love the game! Went to install 2.80 (followed directions in manual) No go. Still version 2.75. Tried patch 2.81 and 2.82 and get no results. Totally messes up UT. Can't even get the UT mainscreen. WTF?! Am I missing something? Please advise...........Thanx