Dynamat works...for certain situations
nuf said.

The only way your really gonna stop the rattles is to find each individual rattle and then cushion the cause with foam tape or something similar.

My 94 Prelude S has a rattle that comes from the plastic panel that the power window switch is mounted in. I press down on the forward end of the panel and the rattle stops. I see a 1-3 inch long piece of double back sticky foam tape in it's future. And I predict that it'll happen on the day when I finally get really PO'd with it and have a screwdriver in my hand!