I installed a mp3 deck yesterday, had to cut the oem harness because best buy didnt have adapters for it and also that I have a oEM Amp for the speakers. After half a day of taking out the center console,etc. I finally got it in without any new plastic panel to hold the deck, used the OEM one, and cut it to fit the new deck. Ill also leave the speakers stock , the sound is enough for me.

Cool

Day late and a dollar short...but you can get the wire harness adapter for the 240 oem plugs from ebay...did you get it hooked up the the factory amp? I just took mine out.