We use the !model plugin and sourcebans in combination. You can setup "VIP" by group through that. We customized the script to allow admin flag 0 or something to have access to those commands.
!giveak & !givem4 was used off of the admin flag 0, so all admins and vips have access.
You see where we're going. Setup an admin flag for it and use sourcebans.net to assign folks the vip they need. Works very very well for NS.