I am the proud owner of a Dual 867 MDD PowerMac with a Superdrive. I am interested in adding a second hard drive to my machine, however I am not interested in opening the machine to peek around and what has to be done. I wish to open my machine only when I know what I am doing, how to do it and why I am doing it. I have built NUMEROUS Wintel boxes myself so working on the inside of the machine is not the issue, my issue is that I am still paying off this box and don't wish to do any harm and I have NEVER done work inside a Mac before. Here are my questions: 1) I would assume that the main drive is on an ATA 100 cable and there should be another plug on that cable for a second drive. Is this so? Do I need to set 'jumpers' to mark one drive as a primary and another as a slave? 2) I would assume there is a hard drive bay in the machine waiting to take another drive. Where is the bay? Does it have any shielding or guards I need to remove? What tool will be needed to do this? 3) All drives require power, is there an open plug on a power harness somewhere? Do I need to get some kind of adaptor to run the power? 4) Does anybody know of a SPECIFIC brand or model of hard drive that would run the best in my machine?