This installs and uninstalls mods for you with a lot more ease than doing it manually. You’re probably going to want lots of mods installed though, so it’s best to use the Fallout Mod Manager. It’s best to make a backup of your Data folder before you start modding in case you need to return Fallout 3 to its original form. Windows will alert you that you’re overwriting files, so press ‘OK’ to accept the changes. If you have the Steam version, typically this will be:Ĭ:\Program Files\Steam\steamapps\Common\Fallout 3\Data All you need to do is place the new files you’ve downloaded into the ‘Data’ folder of your Fallout 3 installation. Installing a single mod into Fallout 3 is easy.