Locking down XP in a NT Domain

Currently have a NT Domain (which we a upgradin soon) with Win 98 clients. These clients are locked down (no control panel, run, display, etc.) using polices located on the PDC. I amaware that I cannot accomplice the same thing with tose policies on a XP box. However my question is How can I lock down XP Pro for all domain users except admin (without active directoy)?