Owen a good friend and Video Artist

has told me that "You can get dedicated 2nd video out from the ibooks – it’s built into the graphics card, but has been disabled in the operating system. Install this - http://www.rutemoeller.com/mp/ibook/ibook_e.html and you have a dedicated second video out J

It’s installed on Tony’s ibook and has been on two of Andy’s without any negative effects…there’s even the software to undo it should you want to take it in for repair and not have a voided warranty….