I currently have a G5 tower with ATI 9600xt card and 1, 23inch display. I would like to add another (sony HDTV LCD at costco). I don't quite get how i am suppose to do this. Do i get a cable that splits the 1 DVI port or do i use the other port on the card which is different than the DVI. ADC i think. Or do i need another card all? thanks!