Actually, I've been so lax in updating my sites, however, check out
http://members.shaw.ca/reboot/ for the driver.
Get 2.1.2.135b for Win98 (it's V.90) as it's the most stable, and fastest driver around, especially on older systems.
With the right tweaks, the HCF can be a reasonably fast modem, with less stability problems than the HSF.