I was having problems with this game with the latest drivers from nvidia. I installed the 44.03 whql certified driver from last november and it fixed all my problems. Note that the newest drivers are whql certified for the fx line, not the geforce, even though they are listed for both. Hope this helps.
P.S. I have a gf2 gts/pro. I had extreme choppiness in the in game menu and loading problems with the newer drivers.