changing power settings remotely

I am trying to determine a way to change my users power setting to Presentation. They are all Limited users and do not have the administrative rights to change these settings them selves. My setup is 600 Windows XP machines logging into a 2000 server. They all use local profiles. Any ideas on how I can accomplish through a script or group policy the ability to change my power setting to the Presentation power scheme without having to log into every machine as administrator and changing them manually would eb greatly appreciated. Thanks