Unfortunately, we cannot help you as you have torrented the game and no one knows what's in that torrent because there's so many torrents of the game out there with many different versions.
While I personally have torrented iso image of the game myself, I have bought the CD copy of the game at least 2 times before so I legally have a license to the game, so I do not feel bad. I probably should have made an iso clone of it back then but really there's no difference in that then downloading the cd image somewhere.
Due to legal liability, Argonath cannot facilitate any support to pirated versions of the game, therefore we cannot help you. The only advice I can give is this: If you have bought the physical CD or steam version before, try to find a backup of the game in the form of an .iso image file, mount it, install it, and downgrade if needed.
Locked as, again, we cannot facilitate any support or discussion of software piracy.