I have a PowerBook G4 and recently acquired the hard drive from an old Mac computer (tower). I want to take the old hard drive and use it as an external hard drive for my PowerBook. I got myself an external drive case and have it all set up and attached to my PowerBook. I erased the contents of the old hard drive and now want to get it ready (format it and partition it, etc) to use. When I go into Disk Utilities, partitioning is not an option like my mac HELP keeps telling me. What am I doing wrong? Please help! What do I need to do in order to make this a functioning external hard drive? My computer is recognizing that its there, but I'm afraid to transfer any of my PowerBook stuff over to it for fear of loosing it if I don't do this right! Can anyone please help? Thanks!