Netgear Wireless-G Notebook Adaptor (wireless card for laptop)

new - I bought this for my friend's laptop but he has windows 98 so it won't work, and I lost the receipt and now can't return it. It's a Netgear 54Mbps Wireless PC Card, WG511

Here's the info from Staples, where I bought it:

*  Wireless 802.11g technology
* Up to 54 Mbps - 5x faster than 802.11b
* Delivers digital images, videos, and MP3 files with ease and speed
* Provides maximum mobility from home, the office, the airport, and other public access areas.
* Enhanced Security - WEP encryption: 128-bit for both 802.11 band 802.11g devices.
* Backward compatible

Retails for $50 - only asking $20!! in box, with disk, manual, etc