pammy

Hi I just got my Journey and so far I love it, Ido have a question though - I know there is a usb in glove box for Iphoneuse but to my understanding I cantload the music from iphone to hard drive so I would like t use the decoder - is that the Aux outlet in lower corner of radio and how do I connec it, do I have to buy the connecting wire from dodge or do I pick it up a store, will radio controls work it of do I play the ipod directly from the phone as it is plugged into aux??