I have a compound miter saw and want to install crown molding in a room that has one wall with a doorway at a 45 degree angle. Because of this doorway, one of the walls is off 45 degrees so I have two corners that have odd angles (one inside corner with 135 degree angle (one outside corner with 135 degree angle). How do I calculate the angle settings to make these cuts on my compound miter saw? If it helps, I could fax a picture of the room diagram. Thank you. Todd