Really I'm just posting to have participated in the forum. Actually I'm new to arduino, and don't even know how many pins the screen actually uses. My version of the screen is a Pixnor screen made by someone who does not really provide technical description, examples, etc.,, and some of the pins are different, or perhaps the entire chip driving the shield is different, so none of the adafruit sketches work. I haven't figured out anything more than how to hook up the touch to an x,y coordinate serial read,, there's an example somewhere that leaves all of the pins unplugged, with the exception of the touchpad data wires, and lets you play on a dark screen with the coordinate plane.
but anyway, my first thought was, really the touchscreen should plug into a protoshield, which would allow you to have a pin-layout which runs to a protoshield, and then your screen would be fixed over that layout, when would then plop onto your arduino, or back off again without disassembling your sensor/input layout. (which means you can still rig up some experiment with the arduino without having to rerig up your screen and sensors.) ,, So I think I'm going to go about getting more proto-shields.