im typing this on a intel imac right now that has an apple cinema display set up in exteneded desktop mode. i know this is different than hooking up a projector, but this should still apply in principle. ihave the cinema display tagged as my main monitor (to do this, drag the apple menu bar from one monitor to the other in the display system preferences window....whichever has the menu is designated the primary display) when i engage front row, the imac screen goes black and the cinema display screen displays the familiar front row icons. (please note that the imac screen is a sorta of dark gray like any lcd when it displays black, because the backlight is still active). now when I engage eyetv2 in full screen mode, the imac display is still active. hope this helps.