Just to pipe in, Junkhacker is spot on. The old client breaks in quite a few places when you wander past Windows XP. The new client [B]does[/B] support Green FOG on xp+, in fact its already been developed and will be available in the initial beta release of the new client.

you should not need any automated logins for FOG. As long as the NIC works and has drivers you should be fine all the way to joining the domain.