Hey all, question about the AVIC x910bt. I'm thinking about adding a backup camera and have a potentialy obvious question. First, when you put the car in reverse, does the camera automatically turn on and display the image on the screen or do you have to press a button to turn on the camera/display the image on the screen. Second, and this is probably the obvious one, I would need to wait for the the unit to fully boot up before it would display the image, correct? In other words, I get in my truck and start it, the unit fires up and starts the booting process, the image wont display on th