You've done a fresh installation, setup some categories and forums..
And hate to do this 50 times if you have 50 forums.

This is what we've done: We've made a fresh install, setup an admin category with staff forums, an announcemnet forum and site feedback, an archive and a chit chat area. Then we exported the .sql and imported it into a bunch of new databases. Uploaded the licensed vb files to those directories and updated the config.php.new file to point to the appropiate database.

This saved us a lot of time to make new forums. And all we now had to do was add the content specific categories and forums.

Saving our staff having to register again and again, and the admins from having to setup the forums agains and again.

Note: You MUST have a license for each instance of vB you're running!!!!

Funky idea. I just with I had 50 forums to set-up. :(

Hmm, so you just created a 'default' database and used it over and over again? That's kind of a unique idea. I guess it'd be a lot easier especially if you had a lot of boards that you needed to install, but if you have 1-2 boards, it might be more risky and more trouble than it's worth, but I can definatly see how that could be good for more than one board - especially the staff re-registration part.