I want to install dynamat on my doors but I am unsure about how. There is a plastic sheet that covers most of the door, it seals the window and prevents water from entering the car. Where am I to install the dynamat? I know that under the speaker bracket one can apply the dynamat, but can it be applied to the rest of the door where that plastic sheet is lying?? If it is possible how do I do it? Also which would be better, the Dynamat XTreme door kit or the Dynamat Spray? Anyone have pictures??