Try to find a Windows 98 upgrade CD (with license key, if applicable) on eBay, if that's the only possibility.
I received a sandisk sansa m230 mp3 player as a gift and discovered that it is designed to work with XP operating system. Unfortunately I have only the basic Win98 operating system and have been able to find a driver that would allow me to download music. I have noted within other discussions at CNET that there is available a driver for Win98Se but have not been able to find something to work with Win98. Can anyone out there give me a hand?