no, i dont think you can set it up as a 2nd monitor. That is exactly what I tried.
BUT, you CAN get both of the screens working at the same time in mirror mode.
You just boot up without the TV connected, and then plug it in, in windows display advanced properties, go to the TV section and enable the tv. FINISHED! But then you cannot run mamewah. :/
But the next time you reboot it will default to the tv, so it is a big hassle.