How can I double check? From that point forward, you should be taken to the title screen when you start the base game. Copy the all mod files from the mod download to the game folder, replacing any files with the same name as needed. Instructions from here are the same as Windows. The autorun folder is the same as the top level folder in the Windows version of the game, where game files and character files can be found. Launch the game! You should now see that your mod is installed via the changed message at the beginning. Copy all the mod files from the mod download to the game folder, replacing any files with the same name as needed. Locating the original files is different depending on whether you use a standalone copy of the game or the Steam version. This process is standard for all mods and becomes very simple when you have a feel for it. Installing a DDLC mod involves adding the mod files to the original game files or replacing some of the original game files with new files.