I bought & installed the video card Ethan recommended. Thanks man :3
But I have one problem now:
I'm using a 64-bit windows computer, and i've installed 4gb of ram. When I look at my dxdiag, it says 4096mb of ram, but when I look at my CPU meter or task manager, it only shows 2gb (and windows 7 uses loving 55% of it D:).
Any fix for this?