Has anyone installed an XM receiver that wires directly between the existing Durango antenna and the socket on the back of the radio? Or am I stuck with a setup that uses an external "fob" that transmits into the car's fm radio?

I had this "hard wired" setup built into my Ford Explorer and there was an adapter avilable for Ford to change the "gender" of the antenna wiring so the XM connectors would mate with the car's antenna and radio plugs.

If you've done this install, where did you tap into the 12 volt power for the XM module?

Thanks.