Hi stwils,
I'd like to encourage you to do this, also considering you use the obsolete Win 98 SE. Firefox or Flock as Mozilla type browsers are browsers that can be made more secure with some security extensions installed as well: NoScript, Adblock, MacAfeeSiteAdvisor, DrWeb anti-virus link checker would be the ones I think are providing good in-browser security. Update this browser regularly, as well as the extensions.
Combine this browser with one good resident av solution, like avast, install Ad-Aware, Spybot S&D, and SpywareBlaster as a free anti-spyware solution. You could also install the unofficial service pack for Windows 98 SE making your OS more stable, giving it the latest patches, and giving it full USB functionality for USB 2.0 tec. If you install RestoreIT if you have hd space for it, you can always return to a safe configuration whenever you need. These are some considerations you can make,
be safe and secure,
polonus