Okay...I have SP3 not SP2.
I applied the patch, started the game, screen went black, the resolution changed, and I got all excited...and then it just brought me back to my windows desktop as if nothing ever happened.
So I read about the performance tweak at the bottom of the readme for the fix. I put the DLLs in the right place and tried again...it worked!
Gameplay isn't that great though...I'll be driving down a track, everything's rendering great, and then all of a sudden everything will render choppy for a while (30+ seconds). I'll try messing with the video settings to see what I can do. But yeah, with those provided DLLs, everything works great. Much thanks!