How to hook up subs to a stock stereo in a 05 Lincoln LS?

OK, so I have a 2005 lincoln LS, I want subs in it but want to keep the stock 6 disc changer. I have installed subs before but on an Aftermarket cd player, where you just plug in the RCA's and the Remote wire and call it a day. I dont know how to hook them up to a stock stereo though. Is it Possible? How hard is it?|||yes it is possible. just take the stereo out and connect the remote wire to the blue wire with wite stripe. and idk about the rca cables. there should be a rca connection on the back of the deck.|||You'd have to go buy an adapter. Once youve got that, it should be pretty easy, similar to an aftermarket head unit.