TravisH: This problem has been reported, so I guess it could be a (very big) bug. hehehe Sorry for all the problems guys, I just don't have the time to test this script. I will however, find some time in the next few days and make some testing and improvements
WoodiE: No, there shouldn't be any problem. I think you can use the database schema from 2.2.0 to the newest version available. But remember that the vbulletin version where the script will be executed, should be 2.2.7 or newer, that's the only requirement.