I am tying to install some http://www.partsexpress.com/pe/pshow...number=264-837 into a 1999 Dodge Intriped. Tell me if I am going about this correctly. I have traced an outline of the orginal speaker and will trace the new speaker also. When I cut this out there should only be one piece, which I screw into the old 6 x 9 opening, then I screw the new speaker into the wood. Is this the way to go?