[psalzmann]

Not that it helps, but try this:

1. install vb fresh, locally
2. register in your fresh vb as a new user
3. monitor the tables

Questions:
1. What table(s) was populated?
2. Anything needing done to usergroups?
3. Anything else noticable?

I would start there. You can then do it manually once you know what vb requires as a new user. I do think you'll need to have the password for the vb user manually salted and hashed while adding to the vb user table. The email address for that vb user can be associated with your user table in your other app. That could be the common key here.

This can actually be approached in many ways but if I was to do this right now, I'd spend 10 minutes installing fresh and doing that I've mentioned above just to be safe .. if you are not fully understanding the vb datastorage methods and coding.

Peter