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 New Vegas\Data All you need to do is place the new files you’ve downloaded into the ‘Data’ folder of your Fallout: New Vegas installation. Installing a single mod into Fallout: New Vegas is easy.