So I'm sure everyone is sick of helping out with deck installs, but I just have a quick question. I want to put the Sony GigaPanel into my gf's 2001 chev malibu, and I have the wiring kit and antenna booster. The guy at best buy (though I just called to check prices on the kit, I try to ignore everything else they say) reminded me that there's some sort of wire harness for around a hundred bucks to make sure the door dings continue to go through the car speakers, and was something I need for sure. Circuit City kindly told me that there is such a thing, but you can ignore it and you just won't get the dings anymore, if you get some sort of extra wire and it's a quick fix. Can anyone shed some light on this for me please? Need it? Forget it? Thanks in advance for any help.