1. If your using vb3 make sure your cookie settings and vb
license number are correct. There are tons of threads on these forums about this. More than likely you forgot to enter the vbulletin cookie prefix on install of bb. You can view the settings table in phpmyadmin and view settings 181-183 and make sure the cookie settings match vb
and the prefix is entered correctly. In your config-inc.php file make sure $vblicense is correct by looking at the top of your vbulletin files there license number is shown up top.
2. I have no idea what your asking here?