I have a 8800GTX and i recently installed COH Opposing Fronts Beta, and it came up with a performace screen. The screen said i have shader modle 3 and the recomended one is shader modle 4? Im running windows vista so why dont i have shader modle 4 with a 8800GTX? http://i218.photobucket.com/albums/cc197/Harrybo17/Capture.jpg?t=1187883206 Also it wont even let me install it! It says failed to install access denied!