It's possible and a good idea, saw the addon somewhere when I was searching addons for PHP-nuke. However then the users themselves would have to join different groups, which means we would have a standard group (of something). Which would be possible, I just don't have the time to look for it right now but if someone could it would save much time for me. Damn, some smilies here are crap (another thing to do, hehe).
Anyway I plan to be finished with the smilies, gallery and some other extras by next week.