PC Lockdown

Hi,

here is the scenario, I have a peer-to-peer local area network, about 40 of them, and 2 XP home editions. I want to prevent the user from installing programs, and from changing settings. I know that you can do that if you have a NT or Win2K by using group policies. But how can i do it in a peer-to-peer environment? either centralized or decentralized. Or can i use my XP to serve as policy servers.

thanks in advance