Windows MCE 2005 needs access to domain

I know that MCE is not supposed be able to be connected to a domain, but there has to be a work around somewhere.

My problem, I’ve inherited an office with mixed machines, some XP Pro, some MCE. All of these machines need to be able to access the same document server. If I use the administrator account to login from one of the MCE machines to the network, it works fine. But we want to set user permission and limit the files that can be access by certain groups of users.

Any one have any ideas?

Thank for your help.