I presume that BlindBikerz was talking about getting USB flash drives to work under windows 98, and it is a pain since most USB flash drives don't come with 9X drivers these days. Personally I would just chuck one of these modern linux distro's into the old PC, since it sounds like its nothing more than a office PC, but anyway:
http://www.technical-assistance.co.uk/kb/usbmsd98.phpThere is a generic USB mass storage for Windows 98.
Disclaimer: while it works for me, it might not work for everyone, and not all USB storage devices are supported. And please, please, read the instructions, that say "remove all USB drivers" before you proceed.