If you’re looking to mod cars in GTA 5 Online on PS4, there are a few things you’ll need. First, you’ll need a game account and the appropriate software. Second, you’ll need to create a new file called “mods.txt” in your GTA 5 Online directory. Third, you’ll need to add the following line to that file: “gta5online\mods\vehicles\ford_Mustang_Racing_2015\models\ford_Mustang_Racing_2015.mdl” Next, open up your game client and click on the “Options” button in the top left corner of the main screen. Then select “Game Content Settings.” In this setting, you’ll want to set “File Content Type” to “Text File.” Finally, set “Password Protection” to “No.” Now close out of Game Content Settings and reopen them so that they take effect.