Found a pretty amazing game online yesterday. It's a simple install, only 2 tracks (Adelaide and Bathhurst), a handful of cars, the basics. But very playable.
Driving Speed 2
I played the PC version.
Only 2 tracks, 5 cars, limited setup options, 2 championships, that's it. Works great on my non-3D gaming card laptop with everything turned down and on lowest res.
There is also a link on that page to "Driving Pro". Not sure if this is the same game with a different name or not but there's a demo.