If you have an existing phpBB Forum and would like to integrate it into one of the newer PHP-Nuke versions that come with phpBB Forums, you should use the phpBB to PHP-Nuke Script from the PHP-Nuke UK Forums. To install it, put the code into a file, edit the variables at the
top and save it as transfer.php, for example. Upload the file to the same directory as your PHP-Nuke config.php and point your browser to it. See also How to integrate new PHP-Nuke with existing phpBB Forum.
Backup both your PHP-Nuke database and your phpBB database before running this script.