|I an using a Fujitsu ErgoproX with a wireless USB, without problem. Actually the pc is close enough to the router to use a network cable.|
However I have only used it with W2000.
As Jam says, you need to have the W98 drivers for the device concerned.
Unrelated to wifi, not that long ago I installed the maximum amount of memory the pc would support. This I bought (as with the wifi usb) on ebay, at very good prices.
Good luck - Keep us posted.