Why would you want to circumvent the Security of all these machines by plaacing the Domain Users group into the Power Users group ?

Do you have some valid reason for this ?

I'm sure we can help you to accomplish this goal, but a better understanding of Security for you might be a better choice.

I know that AutoCAD has issues if the user is not a Power User, but then only AutoCAD users should be Power Users, not Domain Users, this is one small notch down from being Administrator.

By having Domain Users members of the Power Users group on all workstations allows Virus/Worms/and Trojans to spread much more rapidly. Potentially bringing your Network to its knees.