Oh, the pain in my head...
Well, I got the disk copy software. When I ran it it suggested that I make a recovery disk. When I attempted to do that, it would write to the disk but never complete the writing. It would just hang.
So I rebooted and tried a disk copy. Sure enough, as soon as it was ready to do something, it hung.
So maybe the best thing is to start with a new disk - I could use my old Maxtor 250GB IDE, but I think I'll buy a new 750GB Seagate with 32MB cache because after all this grief and pain I deserve it.
Think that's the best answer?