I will not lie here, I am a complete retard when it comes to this. It would do me good if I got a COMPLETE walk-through with creating the addon folder because, like I said, Im a retard on this topic.
what you need to do is go to the gamedata directory and make a new folder and name it "AddOn". then get a map and (this worked for me) instead of cutting and pasting you need to copy and paste in addon. Thats it hope it helped.:)