Win 2003 sbs with Windows 98 client

I am tech support for a church with a new 2003 sbs server I set up about 3 months ago. Being ignorant of some things, I set up a real long name for the domain server. Now I can’t put that long domain name in when setting up a client computer with Windows 98 SE.

Any ideas?

Apparently you can’t change the domain name after it is set without reloading the OS.