You are back Gaz..!..thought you were gone for good this time...
I dont know the answer to your question but I just wonder why you would want to do that..?
My advice is to save up and buy a 7 or 9 inch screen when they are on special or discontinued...I couldnt imagine using a 4-5 inch screen after having the larger ones now...even using a single 9 inch with split screen is a far sight better...