If you have the full version of Windows 98, you can just get the WinXP upgrade.
Here's that chart:
<A HREF="http://www.microsoft.com/windowsxp/pro/howtobuy/upgrading/matrix.asp" target="_new">http://www.microsoft.com/windowsxp/pro/howtobuy/upgrading/matrix.asp</A>
<A HREF="http://www.geocities.com/btvillarin" target="_new">My Website</A> - updated basically everyday.