I'm going to try that, thanks !

Unfortunatly it is not possible to display 4:3 with the Apple TV :( that why I'm trying to find a solution on the TV. Thanks

I received an Apple TV for Christmas and I used a very easy hack to connect it to the TV via composite: http://www.tuaw.com/2007/10/08/found-footage-apple-tv-composite-hack-in-full-color/ Now I have the image in color but only output 16:9 video , as you can imagine the image doesn't have the right proportion. Is there a way to change the image format