Does anyone have wiring diagrams or guides for the 2001 I30t nav system. I am looking to put either the NAV-TV system, or aveelectronics system. Has anyone install this before? NAV-TV is now requiring that you get the wiring done at a custom audio shop. However Aveelctronics sells directly to you. It seems there only 4 wires to cut so I would like to do it myself.