Dunndada

I am trying to run tv turner, xbox, navigation, and the pioneer P6500...the brain on the indash unit has a VCR input, which I am using for the xbox...just wondering if I can get a CD changer cable with RCA inputs on the other end, or any other options...someone please let me know how I can add extra audio inputs into the deck. Of note, I want to have an extra input on top of these sources in case I want to plug in a laptop or camera and get sound out of my audio system...thanks!