Done some more testing and I can run it in 1920X1200 16bit, but not 32 bit,, I ran it on Nvidias 182 drivers before at 1920X1200 32bit but the last steam patch did something crazy to my PC, I installed GTR2 from the CD DVD and no problems at all with all graphic settings to high and everything Maxed out in the game..
I posted my system specs elsewere in the forum here but ill post them again maybe it will help.
OS Vista Ultimate 64bit
CPU Intel X6800 Duel Core @ 3.32GHz
NVidia XFX 790i Ultra MoBo
3 way BFG 280 GTX OC SLI Video cards
8 GiGs Corsair XMS Memory @ 1333
1 WD Raptor 300 GiG Hard Drive
2 150 GiG WD Raptor Hard Drives
Ultra X3 1600 Watt Power Supply
Logitec Z5500 Sound System @ 505 Watts
Viewsonic 28" LCD Monitor 3mil Response Time