Unhook one 2003 tower at the office. Take it home. Unhook one 2002 computer at home. Set it aside. Install 2003 PC there. Curse Novell networking as you set things up. Fiddle for a while with that, the wireless link and the printer settings. Get everything up and running.
Look over at the 2002 tower. Waver on when exactly you’ll swap out the 1999-vintage PC, upstairs, for the newer system. After all, you haven’t yet figured what you’ll do with the oldest computer once it’s unhooked!