You can discuss vbadvanced mods etc in the code hacking forums. I can not tell you how they make things appear or not appear on external pages. I do beleive they have a hack on there site which explains how to use vbadvanced on external pages which use the vb
header system. You might try placing that line in our header-inc.php file which is the one that pulls the vb
header system but who knows since I do not use their product. I use vbportal
As far as our product permissions in admin => edit usergroups is where you set permissions for the users and if you do that then you should be fine.