So I just built this great computer, and I have an old computer(ok, not old, just not as fast, its only about 6 months old) and I'm going to take out the hard drive after backing it up and I'd like to put it in my new one. Heres the thing though: The old one has XP on it and this one has vista. I'm not going to use xp anymore, but I was wondering if its pretty easy to add a hard drive WITHOUT screwing up this new computer? I mean, after I've formatted it. And this computer is set up SATA connected, but the other hard drive is IDE connected. Would that be a problem when adding it? OR should I just say screw it and deal with a 160GB hard drive? Let me know.