Microsoft Windows Vista * ATI Catalyst Media Center * Snapstream BeyondTV * Cyberlink Powercinema * Intervideo Home Theater. I have read quite a few threads talking about this both here and elsewhere and none of them seem to give me any advice that both applies to. Is there any way to enable ATI Catalyst "Theater Mode" in Extended desktop under Windows 7?I have the following video card: Radeon HD Ati clone mode.