I have a Toshiba and on the remote there is a button that you can change the aspect ratio of whatever is on the tv. It comes in handy when playing regular xbox games on the 360 as they aren't in widescreen format and you have to chage it so you don't play games with a black border around it.
Edit: There is a View Mode button on your remote, the manual says that's the button you need to use. I have no idea, it was in the manual
