I recently picked up a free xbox 360 but it has no hard drive. I can buy a refurb 20GB for $50 but I was thinking about picking up a xbox 360 hard drive case for cheap and then putting in my own hard drive (newegg has a 120GB for $50). Is there anything I need to be aware of before I do this? Off topic: How easy is it to hack a 360? Besides live stuff would it have any affect on media center stuff or netflix streaming?