According to Iomega:
USB and FireWire (1394) Update Module
Description: This module uses Microsoft's own patches to fix many USB (for Windows 98/98SE) and FireWire (for Windows 98/98SE/Me) problems with system hangs, blue screens and slowdowns. For Iomega CD-RW users, it helps your CD-RW drive become detected by both Iomega HotBurn CD-Recording software and/or your operating system by installing a USB driver.
Installation: Once you have downloaded the software, double click the file to extract and launch the installation.