The following driver should support your card under Windows:
http://lavalink.com/wp-content/uploads/d..._07_15.zip
In order to install the card you will need to extract the contents of the zip file to a folder on your computer and once the card has been detected by the Hardware Wizard you will need to point it to the root of the extracted Windows folder.
One thing to note is that this card was manufactured before the parity requirements of modern motherboards (ie Motherboards Manufactured after 2006) so you may have trouble detecting the card or booting with the card on a newer Motherboard.
- Lava Support