it added a ton of code for vertex shading in the manual patch. Trust me, I ripped it apart, and I know exactly what's in it

Go to your graphics card's manufacturer like Nvidia or ATI and do a search for a driver for your exact card and download and install it. If the latest drvers don't work, your card is now officially too old to play and you should get a new one. For like $40-50 you can get an Nvidia MX 4000
http://www.newegg.com/Product/Product.asp?Item=N82E16814139160
It's a nice, reasonably fast for the price card that I know can run SRO pretty well. I think they make a PCI version too if you don't have an AGP slot.