Originally Posted by Killerfist
I don't think that you can, you could however create two backup folders (if you have the space and patience for it) then just switch them out whenever you want to play online or play offline with mods. One would be your modded game, the other your backup (without mods).
I always keep the episodes (tlad and tbogt) clean for multiplayer and use the basic gta 4 for modding, but I'm guessing you've only got gta4?
Yes. But I figured out what I could try.