Man you didnt have to uninstall the whole game
DDD I had such problem when I installed too many cars. You could just restore old vehicles
I could play with 11 cars but when I put another one...the game was collapsing. You installed the traffic load which forced on your PC loading many many modded cars(I had that - I lowered the cars per time cycle) which combined with ICE grpahic gave you the crashing results. I think....
Begin with ICE. Then instal few cars (11
) then if everything is ok try to add them more. If it collapses than restore old machines.
Stay with the 1.0.04 patch. You will be able to install newer but won;t be able to instal older.
I was installing patch before and after modding cars...no difference I believe. But usually I patched the game at the beginning.