From what i've read it seems the Rev B doesn't work but the Rev A does. Another thread here stated that some Rev B's are actually still using the same chipset. On the back of mine it states Rev B, but opening it up on the PCB it states Rev A, and there was no vista label on the box which is another i've read here to look out for as they seem to work.

backtrack sees it is a wifi device but cannot start it, guessing due to drivers? Could someone please point me in the right direction of what drivers are needed and how to install them?

Many thanks