I have a TR2MP with the b/g WiFi. I downloaded an update from the http://www.Vaio-link.com site which I could forward to you but don’t know if you will need the original as pre-installed on my machine.
I am a very happy chappy at the moment as I have finally managed to setup WiFi from my TR2MP to Desktop via a Netgear USB2 device (took me 4 days experimenting).
Had all sorts of phone help I was starting to think I had a faulty WiFi in the TR2 as I could not maintain a link for more than a few seconds, then I remembered I have a TV to TV wireless transmitter for sending the signal from my Sky+ box to another TV which was to cause of all the lost connections.
Anyway, give me an email address & I will forward the file to you.