If your message was going to continue to say FrontPage 2003, then, yes you
will have to upgrade to Windows XP.
Note that Windows XP Home will not support a webserver, if you need one for
testing server side code (ASP, PHP pages, and forms). For design, and
testing other ordinary .htm(l) pages a server is not required.
All other versions of FrontPage will run on Win 98SE.