Hi! I have a Mac Pro (first edition) quad-core (2x 3GHz dual core Xeon) and I am wondering if I need a RAID card for my purposes. I'd like to have 2 hard drives for storage (the 250gig stock plus another larger drive), a third drive for time machine, and a fourth drive strictly as a windows drive (no backup needed). Do I need to have the actual RAID card, or can I just use the RAID software for my purposes? Thanks for the help!