The drivers are here: http://support.linksys.com/en-us/support/adapters/WUSB11

Since it was used with Windows 98SE, Me, and 2000, Marc's advice to use ndiswrapper is appropriate.

I doubt if you're going to find anyone using a device that old to give you first hand experience with it, but, the manuals for the device are also listed on the link I gave you.