vB and phpmyadmin

[kh99]

I think you also need at least userfield and usertextfield.

Edit: ...and maybe userlist if you want to keep the information about which users were friends.

Actually, I looked in to it more and it looks like that error message happens if it can't find the userid (so it's probably not related to the tables I mentioned above). But you say that the users look like they're all there? What does the url look like when you get that error message?