So after hours of frustration, I'm finally almost done this. But my question now is as follows; The Metal Case that goes over the DVD-ROM thingy, or whatever, in the guide, it doesn't say ANYTHING about putting it back. Now, when I try to put it back, the case wont fit. But if I attach the case WITHOUT the metal cover, the case fits perfectly. My question is, what are the dangers of not using the metal case?