Wendell is correct, I ran into the same problem. I simply added the users to the Administrators group in Active Directory and told them that it would finish setting up for their user as they logged in that day and that it would only happen once. By lunch I moved them all out of the Administrators group and any remaining installs I did with admin priveledges as needed. Not bad considering I upgraded 35 computers in about 3 hours and then let the users do their own per-user setup.
