Welcome to the forums! Have a fishy stick! With regard to your example, I haven't played Starfield yet, but this procedure looks very similar to how it's done in Fallout 4. You must create a new blank file (any type will work, such as a new text file) and rename it to StarfieldCustom.ini. The contents of that file need to contain the following: This file must be placed in your "Documents\My Games\Starfield" folder for it to work. What the file actually does is that it allows files from mods that you install to override the default files found in the .ba2 archives within the game folder, so that you can actually see and interact with whatever changes the mod adds in-game. I hope I was able to make this example more clear for you. In the future, you'll probably get better advice by asking these questions in the specific sub-forums for the games that you're interested in. Good luck, and I hope you have a lot of fun here!