I’m afraid the latest TXs are preloaded only with Vista and the only way to install XP is yourself. You’ll have to use drivers from older TXs, eg, TX3 series, in Europe, your newest Vista TXs are called the TX5s, there was never a TX4 oddly.
There is a thread on notebookreview.com forums in the Sony section on how to install XP on the new Vista TXs. I have read many complaints of Vista being slow on the TXs, due to the 4200 rpm hard drive and Core Solo processor.
I agree that a 0.3 mp camera is lacking but its competitors the 11.1” WXGA Asus U1F and 10.6” WXGA Fujitsu Lifebook P7120 also have the exact same .03 mp web camera. Its best probably then to get an external camera anyhow thats more flexible and whatnot.
Besides, I don’t like the fact that the cameras are mounted on the top and can’t be turned around to face the back unlike some other notebooks with built in webcams.
edit;
There was also never a TR4.
I just found out that 4 is an unlucky number in Japan.