I cracked my iTouch 4g screen the other day (pretty bad), and I'm going to buy a new screen myself. I've been noticing that they call the screen "Digitizer" sometimes, and "LCD" other times. Are these the same thing? Do they come together with the new screen? Also: If I bring the new screen and the iTouch to Wal-Mart or any other store like that ... can they fix it for me? Thanks guys. I appreciate all the help I can get.