I got three copies of the game, named;
"Grand Theft Auto V NL" (This is my Dutch LSPD:FR folder)
"Grand Theft Auto V US" (This is my American LSPD:FR folder)
"Grand Theft Auto V MP" (This is my clean multiplayer folder)
I just change one of the names back to "Grand Theft Auto V" depending on which one I want to play with.
If I want to play Multiplayer, i just change the "Grand Theft Auto V MP" back to "Grand Theft Auto V" and launch GTA V.
If I want to play with my Dutch pack, I change the name of "Grand Theft Auto V NL" back to "Grand Theft Auto V" and launch the RageHook
I hope I helped!