I'm on the "Driver" level at the boss battle called "Driven to the brink," and, for the first time in the game, my framerate has dropped to about 2, making the game unplayable. I've tried every possible combination in "video options," but nothing seems to help. I'm running an Alienware with a quad-core at 3.2Gh, 6 gigs of memory, and a GTX 480. Any ideas on how to fix the problem or get past the level somehow? I never use cheats, but I would use one here if one exists. Otherwise, I don't see any way to proceed, and I'm sorely disappointed. The game has been fun up to this point, but this is serious. Edward.