Patches the game, disables hyperthreading and problems on dualcore systems. I might have changed more, but it's been so long since I made these that I can't really remember:P
I have the changelog somewhere, I'll dig it up tomorrow. Tested on XP, Vista 32 & 64 bit and on other Windows platforms by other users. I haven't met anyone who had problems running GF after applying this, but by all means, prove me wrong and I'll try to fix it.
Edit; oh, and I think there's a registry patch in there to enable the good_times key(debug mode) but you can already do that manually or through bgbennyboys installer methinks.