I currently have a powerbook and a 20" cinema display. I want to buy another 20 inch display and hook it up to the powerbook. i called the apple store and they said in theory you can, if you hook it up using an s-video out. But ACD don't support s-video. if i bought a dvi splitter like this: http://www.pccables.com/cgi-bin/orders6.cgi?action=Showitem&partno=01700&rsite=f.01700 would and bought a second display, with a 64mb Vram card, could i power two displays. does anyonone know, or use two displays with a powerbook?