I've been using the Gta mod manager for a few scripts I've downloaded, as I'm just now getting into gta 5 modding. The mod manager is perfect because all modifications done in single player are disabled when going online but I noticed I can't add .meta, .ytd, .dll when there's no .asi with it or a few other file types. Does anyone know if there's a way to add in these modified files through openiv/mod manager while still being able to play online vanilla??  

OpenIV will prompt you to mod files by copying the RPFs you're changing into a /mods/ directory and making the changes in the copy in /mods/. It comes with an ASI that will force the game to load the versions in /mods/ instead of the normal ones, leaving the normal versions unchanged.

The upshot of this is that unless your game loads OpenIV.asi, it will not load the modified stuff. You can keep it from loading OpenIV.asi by moving dinput8.dll from the GTA V directory to somewhere else, and moving it back when you want to play SP again. This also disables *all* script mods; a mod manager is not needed to turn your game into a vanilla game for online play.

OpenIV will prompt you to mod files by copying the RPFs you're changing into a /mods/ directory and making the changes in the copy in /mods/. It comes with an ASI that will force the game to load the versions in /mods/ instead of the normal ones, leaving the normal versions unchanged.

The upshot of this is that unless your game loads OpenIV.asi, it will not load the modified stuff. You can keep it from loading OpenIV.asi by moving dinput8.dll from the GTA V directory to somewhere else, and moving it back when you want to play SP again. This also disables *all* script mods; a mod manager is not needed to turn your game into a vanilla game for online play.

Gotcha, that makes sense, thanks for the help!!