Update: In regards to the USB not working, perhaps becuase I haven't done that software hack and just the hardware hack the usb isn't working. Can you not listen to music while drivin or somthing on this unit?
Anywho, I managed to get power, and usb working and no audio noise by not using the harness that came with the unit. When I use the harness that came with the unit, it won't power on, audio output doesn't work at all, the unit is mute when on the cradle, and usb doesn't work.
So I wired it up using the side outputs and inputs on the device itself, IE; Power, USB, and Audio. E