Say I installed 4 PCI video cards in addition to my 1 AGP video card, can I extend my desktop onto all 4 monitors using the native XP software or do I need something special? I am also wondering if I can layout 2x2. I know XP supports dual display however what about quad display without buying one of those expensive quad video cards. I have plenty of PCI slots. I am really hoping to find somebody who has actually tried this out and figure out what their findings were.