Okay, when I choose "High" Texture detail, the game will crash (only when I'm driving, say about a minute after starting a race on average) with the screen freezing, and whatever audio was playing at the time looping every second, I cannot quit out of this, the machiine locks up totaly.
This is in OSX with a 12" ALuBook & 640MB ram.
This ALWAYS happens every time I try to play with "High" Texture detail (normals fine).
If I play in windowed mode, the game never crashes whether on my internal display or external display, AS LONG as I play in windowed mode at a screen res lower than my desktop (800X600 on my internal LCD & 1280X1024 on my external CRT with 1600X1200 Max res).
The same thing used to happen with 4x4 Evo 1, even on a DP800 with Geforce 3 and loads of ram (and also an old iBook, and a Cube Geforce with a NvGF2MX).