All things zipped should go to the root dir. I want people who just started playing this game to have an easy time adding things. Many people lose interest when they have to do something that their parents have told them not to do with the family computer, or they have to learn how to be a modder just add some maps and many other reasons. I've been playing this game since it showed up on the shelves, and all the mappacks I've ever dealt with unzip to the main dir, or I don't use them.