if you remove it you'll run into problems with the system. apparently ATI does that when the card supports dual monitors or something like that. nvidia does a similar thing when another monitor is connected but ati just has it shown all the time.
So in my Hardware profile under Display Adapters, I have x800 Series listed AND x800 Series Secondary. Why is it listing two video cards when I only have one? And how can I safely get rid of the secondary listing? Any ideas? Thanks.