Hi Orac. When I tried that I got the error
Create overlay failed. Please lower your screen resolution or color depth and try again. I can't lower my screen resolution as it wont go lower than 800x640 and the color thing makes no difference either. Can't even play a dvd now without that error coming up...!!!!
(in case anyone is wondering what the wallpaper is, it is Squirt from Finding Nemo... ) 