Posted on: September 24, 2012, 07:08:41 AM
The forum on this site uses SMF (Simple Machines Forum) custom-coded to integrate with Joomla and various other systems that this site runs on.
It's not something I can help you set up, or even something I can recommend someone to help with. You can always try posting a request in the "Hire-A-Coder" area (Link in my sig.) and see if anyone bids.