Switch from Domain to Workgroup

I have a small SBS2003 net with 4 workstations all of which run xp pro. The workstations/users were initially set up to be part of a domain but now I need to isolate a domain problem (by eliminating it, even if just temporarily) so that I can troubleshoot the net behavior in a peer-to-peer manner.

QUESTION: If I go to each client workstation and switch from the domain to a workgroup, will XP keep the current user profile and also use the current computer name? I am concerned that I will lose the user profile when I do the reboot of each workstation.
Thanks.