Wow, well it turns out that I still have the Vanilla2WB.rar file that is required (but no longer available in the link in the original post) to put WB and Vanilla together.
So, I'm going to try to get WB and Vanilla going together, like I have it now.
My plan:
1) Install the latest 2.x version of WB and get it functional.
2) Follow the server-to-server instructions found here:
http://www.websitebaker2.org/topics/moving-from-server-a-to-b.php3) Install the latest 1.x version of Vanilla (not the newer 2.x version) and get it working.
4) Follow the instructions in the "WebsiteBaker and Vanilla, Together" posting that I used before. Some of the instructions won't be needed, since I already altered the database tables.
5) Cross my fingers that the separate upgrades to WB and Vanilla didn't break the "togetherness" code.