vBulletin for Buddy Zone

I have the Buddy Zone script and I am looking to integrate vBulletin in place of the current forum system. I want to use vBulletin in 2 places. 1. for the main forum and 2. for the individual group forums on the group pages. For the group forums some groups are private and I want a way where the group can have a section for private topics and public topics I want this to be integrated with members from the regular site so they only have to sign into the main site and they are already logged in as their profile name for vBulletin. I already have the license for vBulletin I have a few more details I can discusss with bidders.