If you are looking for documentation or a "paper" on how to run these mods, the following are the primary community hubs:
: A popular Steam Workshop mod that functions like an "enhanced" or "reloaded" edition by adding new cars (like BMW and Camaro) and gameplay modes. Technical Guides and Resources flatout-2-reloaded
Steam Community Guides : Detailed walkthroughs for installing the and other "Reloaded-style" improvements. If you are looking for documentation or a
PCGamingWiki : The definitive source for modern fixes, widescreen support, and controller wrappers. and removes the 100FPS cap.
: Fixes common modern issues like stretched HUDs, FOV limitations, and removes the 100FPS cap.