The driver you want (UHCD.SYS) comes stock with MS WIN98 2nd edition. If it doesn't work check your hardware in relation to the following note, then use THIS driver update.
NOTE USB devices plugged into a computer running MS WIN98 2nd Edition may not work if the following hardware components are installed on the computer
- AMD processor (running at 350 MHz or faster)
- VIA Technologies USB controller
This file will should correct that.