NVMax for your GeForce Card. Have N4 set to run at 16-bit color (OpenGL)
but in the OpenGL settings for your GeForce card in NVMax -> Texture Colour
Depth, check 32.
In N4 I now have 32-bit color even though the game thinks I want 16-bit and
my frame rate is exactly what it was at 16! With my GeForce2 Ultra 64MB,
sitting in the pits at Michigan I get 85+fps at 1600x1200!!!
For me a couple of other settings that REALLY increased frame rate and image
quality are:
OpenGL -
Fast MipMap Filtering
Buffer Region Extension
Alternate Depth Buffer
Texture Pre-cache
Triple Buffering
Allow Maximum Frames
Buf Reg use Video Mem
Allow Max Texture Size
Texture Quality = High
Buffer Flipping = Auto
System -
AGP = 4X
Fastwrites
Side Band Addressing
GOOD LUCK!!!