Every time I download a zip-file mod and put it into the mods folder. It doesn't show up in the game. I'm not just talking old outdated mods, I'm talking about mods that are new, and require you to download them into a zip file and put them in the mods folder. For example, I tried downloading the oldfullsize in a zip file, went to documents on my computer, made a mods folder, and it didn't work. Can somebody please explain what is going on here?