damn i am surprised too today i 've played the first patch s1a and i lolled it seems to be more realistic than Z .I mean not the textures and the car handling but the pits are more realistic and when your car is idling and you change gear the car is starting to move like in real life why the devs put off this cool thing?
It might be possible, but i wouldnt recommend trying it. Find an old copy of S1, (there are some lurking on the net) and try replacing the blackwood.wld file in your wld folder with the one from S1. I dont guarantee anything though