Full screen on monitor?



i am trying to output osxbmc onto my TV which is connected to my imac via DVI>HDMI cable.

if i select “mirror displays” on apple, then “1680×1050 (fullscreen)” on xbmc it will show fullscreen on both screens.

but what if i DONT want mirrored mode? i dont see any other full screen choices except the first one, which causes problems on both displays if selected in this mode.

also…if my TV is capable of handling 1080i, how can i select that mode for screen size, and still make it fullscreen? when i select it, it just goes to windowed mode.