I just purchased a used early build '07 SF. I have my order on a couple of salvage yard search lines for an '07 XM radio. Do either the '08 or '09 radios fit or match the '07 instrument panel? What has to happen with the antenna? Is it just one cable for AM/FM/XM? Can I just swap the antenna and radio? Re the map light: Does anyone have any info on the cable to make the map light come on with the open door like how it's routed or a part number for the cable or kit?