This extension is based on Jaime GÓMEZ OBREGÓN phpBB to BBPress script.

(1) Add following lines to your config.php and set the accordingly to your phpBB configuration:

define('DB_PHPBB_HOSTNAME',    'localhost');
define('DB_PHPBB_USERNAME',    'root');
define('DB_PHPBB_PASSWORD',    '');
define('DB_PHPBB_DATABASE',    'phpbb');
define('DB_PHPBB_TABLEPREFIX', 'phpbb_');
define('PHPBB_PATH_PREFIX',    'phpbb/');
define('PHPBB_AVATAR_SALT',    '12345678901234567890123456789901');

(2) Log in to CMSity administrator and create a "forum" node.

(3) Launch http://www.mysite.com/forum?import-phpbb to import phpBB database.

It will import all phpBB users, forums and posts into specified node.

You may re-run import, so it will re-import all forum data again.

Remember to backup your databases prior running the import.