When I upgraded my hard drive I took my old 120 5400 and stuck in a case and now I use it as a backup. I left the whole system on there which was Leopard upgraded from Tiger. What I am trying to do is get all my e-mail I stored on that drive, or rather all the e-mail that was left in the folders I created inside Mail. When I open the app from the external it boots the Mail app from my internal. I tried looking through the package contents of the external HD Mail app for some clue but could not come up with anything. Anyone know how I can gain access to the e-mail from Mail app on the external? And I really wanted to boot from my external to do certain processes to my internal which cannot be mounted for me to do this. I have had no luck booting from an external USB and from what I have read it can not be done because the USB drivers have to be loaded via software not hardware. I can boot from firewire I believe. I just want to confirm this. I was not able to find a firewire case that would fit the MBP drive here in Puerto Rico so I settled for the one case Comp USA had that would fit and was USB. Anyway, any ideas would be greatly appreciated.