Win98 - XP File/Printer Sharing

I set up a Belkin Wireless G router hard-wired to an XP machine and w/ a
wireless adapter in an old 98SE machine upstairs. Internet browsing is fine
on both but I hit a snag while trying to set up the home network. Walked thru
the Network Setup Wizard fine on the XP machine but that machine does not
have a floppy so I couldn't create a setup disk. I read that you could use
the WinXP CD to do the setup on the 98 machine but when I tried it bombed
with an app error -
winxpchk - got the "Performed illegal operation and must shut down" message.
What steps can I take to set up w/o a setup disk?
TIA,
Steve

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Steve Ragan