I probably won't be the only one who has his GTA 5 installed twice. I have the modded versions which I use to play LSPDFR, but I also have the vanilla version which I use for GTA Online.

I own the game within Rockstar Social Club (there's no Steam or Epic involved).

 

I notice that when I try to boot up my modded copy of the game (which is called 'Grand Theft Auto V mod' RPH gets stuck on 'launching game' and simply launches my vanilla copy of the game.

The GTA version that Rockstar Games Launcher uses as installation directory is the folder which contains the vanilla copy of the game. So basically everytime I try to boot up my modded copy, it boots up the Rockstar Games Launcher which automatically boots up the vanilla game. When I try to manually boot the modded game, it won't boot or it boots up the vanilla game again.

 

 

I have read about quite a few people who managed to get this working, I am pretty sure I am doing something wrong. I just don't know what yet!

The game folder must be called 'Grand Theft Auto V'.

The Launcher will always try to boot that folder up.

You will have to rename your vanilla folder to something else and rename your mods folder to 'Grand Theft Auto V'.