I have a 2005 Accord hybrid and I want to install a single DIN radio in the lower pocket behind the gear shifter. I am wondering if it is possible to have the stock radio work ( I have XM and I want to keep using it ) while I have the aftermarket head unit. Would it be possible to route audio through the new head unit? Would it be possible to have audio on both the stock radio and the aftermarket ( not at the same time )?

Thanks