Hi, I was wondering if someone would tell me how I can remove the outer case of my MacBook so I can check the DVD Superdrive alignment. For some reason, the DVDs are very hard to put in, and now won't eject at all. We are thinking the whole thing got jostled and possibly the DVD drive is just out of alignment. I just don't know how to get the case off to check. There is no longer a warranty on the computer. Thanks!