So I just picked up a MBP on a bit of a whim...I was able to pick up a (new in box) retired 2.53C2/4gb/320 unibody from Best Buy (as an employee) for $1429 since they were clearanced.....and well, now I'm trying to figure out this whole Firewire thing... I knew about the issues going into it, but hadn't really given it much thought lately bc I wasn't that hard up for a new mac. What have all the video guys on the forum done? I have a FW400/USB My Book scratch disk AND my Canon shoots on HDV so I'm trying to figure out the best way to accommodate for the computer only having one FW800. Is it ok to use USB for the scratch disk? Then just snag a 4pin FW -> FW800 cable from firefold?