Migrating to TBird from Netscape, take two (more detail)

Well, I tried the suggestions, which seemed to sorta-almost do it, but I suspect I'm doing something wrong. I have just reset everything (deleted and reinstalled Thunderbird), so here's some more detail for the wizards out there:
( Cut for length -- pictures of directory contents below, long, boring )

So, what needs to be moved, what needs to be left alone, and what's so screwed up that I should give it up, chump? Any ideas?

Migrating to TBird from Netscape, take three: The Plot Thickens...

None of the suggestions QUITE worked, so in the little time I could spare before going back to the old machine to get Real Work done, I poked about and found something interesting.

( more geek troubleshooting here... )