Promote to secondary group based on current posting

[Teresa]

I need to be able to promote from one usergroup to a secondary usergroup if the member of that group has posted WITHIN the last 30 days.

Can't find any mods that do this. Does anyone have any ideas?
Thanks.

[kevcj]

Does it "have" to be with the past 30 days? Can it be based off post count or how long the person has been a member?

VBulletin has a built in promotion system, I am going to guess that you looked at the options it has to offer?