Installation Instructions mod FlatOut: Ultimate Carnage Bouncy Mod
Make sure you have the Steam GFWL version of the game installed, as this is the only version compatible with the plugin (EXE file size: 4,242,504 bytes).
Copy the files into the game folder. Edit the FlatOutUCBouncyMod_gcp.toml file or press F5 to open the in-game menu and adjust the settings as you like.
Play!