I had the screen deadlock you had. I have a cannon 4650 printer which upto A3 size.I had to attatch my printer to a computer in my shed ,sys xp, in order to use the A3 size.I was Desparate. However. since then I installed a second Vista sys. on my main computer and this time I ignored all manufacturers software. and used windows hardware search in control panel-
would beleive Vista supplied a driver and everything works even the A3 paper size. Try it good luck Brianb