I tried in the past, it just gives an error message of incorrect hardware installed, or something similar to that. I guess it doesn't recognise the card coz it aint an nvidia.
sorry but didn't do anything for me. celeron D 2,8ghz, geforce 7600GS, alone on track 100fps, watching on many other cars - still around 20-30fps. everything set to low/disabled. and actually I had to change it back to default, because my google earth (v5) didnt work properly (many glitches,...)