Can a KS200M be installed in a 3 way application? I have 2 switches controlling a light and I want one to be motion sensing.  The switch I want to replace has 4 wires connected to it.  1 red, 2 black, and 1 ground.  This switch gets its power from the other switch through the light.  There is a white/neutral wire in the box but not used.  The other switch that has the Line in has 1 red, 1 black, 1 white and 1 ground used.  The 1 white is always hot and Line.  The black is hot because of the white line in.  The red is only hot when the light is on.  Please let me know if can be done and if you have any questions.  Thank you.