There's nothing you can do to stop rattles and squeeks due to an audio system unless you sound deaden your car. It's a pain in the ass, but well worth it. You'll have a better sounding system, your car will be insulated more, you'll get higher db levels in competition, etc...
You don't have to go way out of your way to do your whole car. Just do the main area's like your hatch, and your doors. <img src=icon_smile_approve.gif border=0 align=middle><img src=icon_smile_big.gif border=0 align=middle>
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2k Low....if you don't have air..it ain't low enough...
"I live my life a quarter mile at a time..."