Installing mods varies heavily between the two titles. Always back up your game directories before altering files. For Automobilista 1 (AMS1) AMS1 uses a traditional, direct file-insertion method:

Seamless community recreations of legendary circuits like Le Mans, Spa-Francorchamps, Monza, and Suzuka.

The premier, safest repository for curated AMS1 and AMS2 modifications. AMS2 Vehicle Porting

Explore community custom Force Feedback files (like the popular Danielkart or SilverRaw profiles on forums) to dramatically alter how modded tires interact with your steering wheel base.

the mod archive (usually a .zip , .rar , or .7z file). Extract the contents using a tool like 7-Zip.