I'm looking for a way to get all my users setup to be local administrator on their PCs. All my users are in the Domain Users group. I have another group that I'd like to get them all into called Domain Power Users, but I'm not able to add Domain Users to that container, nor am I able to make Domain Users a member of Domain Power Users. Preferably I'd like a way to do it without manually placing everyone in there.

Any Suggestions?