no LCD's will 100% not work.
the system used to find the position of the gun will not work with an LCD because the LCD updates the complete panel, every frame, nearly instantaneously.
CRT's take 1/60th of a second to draw a single frame. this time is used to determine where the gun is pointed.
they have gotten around this with the new big buck HD games that use LCD/Plasma displays...they use a camera mounted in the gun to read sensors around the monitor to determine the gun position.