Forum Integration to JOOMLA
 

Hi everyone, I have been look many post about this but I can't find an answers.

I just downloaded Joomla 2.5 and I would like to integrate vbulletin 4.2 forum to joomla. Like a bridge.
So user that register on main page (joomla) don't have to register again on forum.

It this possible? if not, I know vbulletin 3.8 work so i'll do this way if 4.2 can't.

Thank you guys.