Installed on version 4.2.0 PL3 and works perfectly. Thank you!
The conversion tool is very handy to populate openfire database with existing vbulletin members. I adapted it to suit my needs (modifying the query) as I didn't want to create openfire account for all members.
The openfire user service plugin can now handle groups as well, so that when you automatically add members, you can assign them to openfire existing groups.
http://www.igniterealtime.org/projec...ce/readme.html