Mass removal of secondary usergroup

[pds]

I made a strategic mistake and added a secondary usergroup to a majority of my users via promotion. Is there a way I can mass remove this group from being listed as a secondary usergroup. Posted this at vbulletin.com, and it seems there is no way within the system.

I also can not delete the usergroup ans re-add it, as the secondary usergroup I am trying to remove is the default "registered user" group in vbulletin. (I have renamed it)

[Borgs8472]

Make another promotion, on something frequent, change secondary usergroup to primary usergroup?

[pds]

Tried it. Changes your primary to your secondary, but still leaves the secondary checked. So your basically in the same primary and secondary usergroup.

[pds]

I would be open to paying for a script if someone could come up with this.