I have two monitors hooked up to my HD4770. When I had win XP on my PC I used to be able to "stretch desktop onto the second monitor" and that made any media player go to fullscreen over both of the monitors. As my monitors are 4:3 this feature used to give me double screen largness when watching movies.
Now I switched to win7 Pro (I do have graphics drivers updated). I can't find that option in Win7 the available options are :
1. Extend these displays
2. Clone these displays