I have been trying to install Serious Sam 2 but it always gets stuck at 75 % and it won't give me any errors or asks to insert disk again like most games do..so any help is greatly apreciated. I've been away from the PC gaming scene for a while so I may be laggin a bit on the uptake. I'm running Vista SP1, AMD quad core Phenom, 4 gig Ram, ATI 4650 vid