Please Help.  I recently bought an ELO touchscreen without the casing from a guy off ebay. (many othher people have have bought them from the same person)  When I hook it up to my laptop the display is opposite of the touch screen.  If I touch the top left of the screen it puts the mouse to the bottom right.  i dont have a video card that supports the ctrl alt up to reverse the display.  Are there any other options?
thanks,