There is a downloadable file which allows USB on Win 98std. I had it sent to me on a floppy from Dell when I purchased my old Pentium 2. Will try to locate it for you. Although it is years old, it struck me as something of a curio even then, being on a floppy and I am fairly confident that I will have just shoved it into a box of disks and saved it somewhere.
In the interim, if anyone else remembers this utility or what it was called, post here so that AA can get up and running pronto
Conan