I went back and read the house curve sticky at the beginning of the this area. The x-curve explained here:
http://www.hometheatershack.com/forums/1307-post3.html is -5 dB at 20 hz and 0 at 63 hz. Wouldn't the goal be to invert that with my response in my home theater? Shouldn't I just dial in a house curve of 0 dB at 63 hz and +5 dB at 20 hz, draw a straight line from point to point via the house curve funtion in REW and try to match that? Are movie theaters speakers responses set up to invert the x-curve so it 'sounds like' a flat response?