Before i go ahead with a new 8-Core MacPro for my own Workstation set up. i wanted to run Leopard on the current 2.66Ghz MacPro i use via my work. I have a back-up 500Gb drive that I recently purchased (WD5000AAKS) and i had a couple questions. 1) Can I run Leopard off my external FireWire Case w/ the 500Gb drive installed? 2) I want to give Leopard a few weeks to test on this MacPro to see how it runs and utilizes the system. and afterwards format it clean for a future Clone drive. Will Installing leopard then formatting it to a GUID/OSX Clone drive or maybe for my windows a NTFS formatted drive..will that make my drive go corrupt/fail or otherwise go bad with the amount of formatting in under say 3weeks? thanks!!