I have a mac pro with two monitors hooked up, a not uncommon configuration these days but I want to do something that I suspect can't be done. The two displays are for two different purposes. An LCD monitor is on the desk for normal computer use and the other display is for the home theater. I'd like to give the home theater display it's own desktop and have it logged in as a separate user from the primary display. So, instead of one dual-head mac. I'd like to turn it into two single, independent heads. Any idea of such a thing can be done?