Safely, only the "mod".exe's.
But if you are totally secure that your installation works as it should and you won't need to reinstall anything, you can delete all the files that come with the mod, as they are writen into the override folder. So all the folder's that have the mod name, the .tp2's and the .exe's and the .debug's, that is if you will not reinstall or make any adjustment's later on, even thought without the reinstall's the game might crash because of a bugs.
Ah might as well keep em then, it's not like it's a pressing need anyway, just like to keep my HD tidy and free of clutter.
Eli kiitosta vain.
