You should have no trouble with 98 se. Its essentially a service patch.
Put in some more info of your system and and we'll see
Upgrading to 98se or me should be possible.
Im guessing your rather attached to your setup
I have old versions of 98 se and ME to upgrade you if you want to try.
I have a system Im cleaning up with 98se explorer 6 or 7 outlook 6 and it runs fine with cable modem.
I actually have to think sometimes when I need to do a system change as it is a little different in XP. Not as much as you would think though.
Im impressed how far 98 can be streched.