Old setup... 17" Powerbook, registered my iTunes on here, all media is on 2 TB external hard drive, all photos reside on Powerbook hard drive. That's all I really care about transferring. I got the iMac today and it walked me through a system where I hooked up a firewire between the two, but felt like I wasn't doing it right, so stopped. My fear is my iTunes will implode or something. I have two AppleTv's and two iPhones, so I can't afford to screw this up. Want the iMac to control the iTunes, but still want all media on the external hard drive. I want the iMac hard drive to have all of the photos for iPhoto. Can someone give me a 101, layman's way to do this?