Mapping drives with group policies

I would like to map user data to certain folders using group policies.  We have a container called admin with certain users in that container like smith.  I would like to map a drive letter on the local terminal server which points to c:\documents and Settings\smith\my documents to P: with a group policy for the admin container so whenever I create a user in that container everything is mapped the same for that group.  Also I would like to hide the c:\documents and settings folders so no one can view anything except there own folder.  so at the end of the day i would like user smith to have something like this:

My Documents on 'servername\documents and settings\smith' (P:)
My Photos on 'servername\documents and settings\smith' (F:)
Excel files on 'servername\documents and settings\smith' (E:)

Thanks!!