I need to take a running windows desktop box that's part of a domain, give it a new computer name, and then continue working on it (with the box having the new name), without having to reboot at all.

I have recently bought a new computer to add to our network. That's where the real problems started. I have a Windows NT Server 4.0 network and i can connect windows nt 4.0 workstations to it all day ...