I have a website, that uses the phpBB3 registration proccess as the only proccess for users. My website also uses SID's to go back and forth from the phpBB3 forum and the main website.

Currently the authentication mechanism "auth_extdb.php" has been created in such a way, that it will auth the normal phpbb3 database, and the website database as well.

I now want to go the final step, and arrange for phpbb3 to lookup and register on the main website ONLY, yet link that user account to the "users" table that exists in the forums database. There's no point in having 2 identical databases....