what graphics card do you have?i am only familiar with ati cards but have a look in:
controlpanel/display/settings and you should see two screens 1 & 2.
right click screen 2 and click attached or just left click it and select extend my windows desktop to this monitor.screens 1 & 2 can be dragged to left or right to suit you set up.
start your dvd or website etc minimised and drag the screen from your monitor left or righ to the tv and maximize it to watch.
also if its an ati card check control panel/display/settings/advanced/displays and set it up as pal uk and 640x480 here.