I'm converting my home from Windows to Mac and just sold my Windows laptop to get a MacBook Pro. Within the next couple months I plan to upgrade my Windows Desktop to a Mac Pro. The Windows desktop I have I plan keep as a secondary computer but it has two internal 250 GB SATA (3.5") Maxtor Hard Drives. I have no use for two hard drives once I do the upgrade so plan to keep one and remove the other. My question: Can I simply add this to the Mac Pro as a 2nd hard drive for extra data. It wouldn't replace the main hard drive that comes with the Mac Pro. Would this be possible and is this hard to do? I'm relatively new to Mac so don't know if it uses common PC Components. As well, depending how the hidef war plays out I want to eventually add a HD DVD or Blu-Ray Reader/Burner. Can I in addition to the Superdrive that comes with the Mac Pro add this as a 2nd drive if it's a common off the shelf optical drive? i know there are some possible changes coming soon to the Mac Pro but I assume this is one thing that won't change between the current and new model.