Really? :-[ Oh well, you learn something new every day
Once you've used the Wizard on the XP PC, all you need do is change your Win2K machine to similar settings.
The wizard usually sets the Internet Gateway machine to an IP address of 192.168.0.1 and net mask of 255.255.255.0 in workgroup MSHOME.
All you need to do is change the IP address of the Win2K machine to 192.168.0.2 mask 255.255.255.0, set the first DNS address to 192.168.0.1 and make sure that the machine is in the MSHOME workgroup (Control Panel | System Properties | Computer Name | Change)