Just get the two versions from Steam directly.
Just get the two versions from Steam directly.
You're asking if it's possible to run multiple GTA V versions on Steam in a way that lets you have both a modified experience and the official online game. It seems you're looking into installing different GTA V titles through Steam in a modded setup.
I perform the task by creating a duplicate of every downloaded file. I store them all in a STEAM folder on secondary storage. I navigate to the game directory—like GTAV—and move it to another spot on the PC or backup drive. If issues arise, I remove the corrupted game and reinsert the folder back into its original location.
Add the item normally as you would for a standard game on Steam.