Zonet ZEW1601 (RaLink rt2500 chipset) driver problem

Can't seem to find any drivers that works. I have searched the tubes for hours now, and after installing the drivers I find, I get a code 10 (the device doesn't start which I figured means that I've got the wrong drivers).

I'm using a WinXP machine in which there is a Zonet ZEW1601 plugged in (ZEW1601 - Zonet). Since the driver on Zonet's homepage doesn't work, and neither does any other, I figured I'd try to install a RaLink rt2500 chipset driver. This didn't work either.

The device worked a couple of days ago, until I formatted my machine, and since the installation disc has gone missing, I don't have a clue what to do. Zonet hasn't got an exactly perfect helpdesk so I turn to you!

Anybody got an idea what to do?

All help is greatly appriciated!