GPL goes rfactor.
http://www.megaupload.com/?d=KC9XGDU1great fun to play this mod and comes with some nice cars sounds.
also comes with the types of tires, 67 and 67_pro, both have different phyiscs grip so you can choose what you like.
I have to admit I have actually tried this, eventhough the F1 Classic mod group is regarded as the devil incarnate in the GPL community. The guy has just ripped material from the GPL mods/updates without permission and bunged it in this mod, which although fun to drive, does not even have different physics for each car. They are all the same under their skins!! You are dead right about the sounds though, that is the only reason I occasionally play it. The DFV is fantastic with all of it's different on and off load engine sounds.
I don't like the basic attitude of the users I see on that forum either. Some of them are converting GPL tracks, again without even a thought to ask permission from the originators. The conversion process isn't too clever either, so when they come out crap they blame the original GPL version as being at fault, when it is the conversion process itself which degrades it!!!