I've got a brand new 20" 2.66 Ghz iMac and I want to connect it to my CRT TV in a dual-screen kinda way. I've been researching and I've read that the mini-dvi to video adapter (http://store.apple.com/us/product/M9319G/A?mco=MTIyNjQyOA#overview) will allow me to connect to my TV, but what I don't know is if it will act like a dual-screen when it does. Does anyone know? If it doesn't, is there a type of adapter that will allow me to do what I want? Many thanks.