setup for my movie room...PLEASE help? The room I am putting this in is 24' long x 16'wide x 10' high and the room will be pitch black (no ambient light). My question is with an Optoma HD70 and a screen of 145" diagnal, does it matter what screen gain I get since there is no light? If so what do you recommend Light grey or white GOO paint? What will be the difference? With that said, once the screen is built, what determains how low I should hang the projector from the ceiling in relation to the top of the sreen. The reason I ask this is because I don't want to set this up and have the sceen look distorted. Last question is will a ceiling fan running in front of the projector distort the picture. I know I have a lot of questions, but since I will be spending several thousand on this, I want it right.Thank you to ALL who answer.