When I download for an example 1991 mod, do I lose my original GP4, does it stick to the game or is it independent so I would still have my gp4 from 2001? thanks
The 91 mod uses a programme called CSM, this allows many carsets to be installed at any one time. So to answer your question no you will not lose your original game. When you use csm to play the 91 mod all the new files shall be put into the game whilst loading, once you exit csm it shall restore the game's original settings