2007 dodge caliber radio wiring

I've seen this already:      Radio 12v           RED / lt. blue      Radio Ground        BLACK / YELLOW            Radio Ignition        (CAN data bus)         Radio Illumination      N/A         Factory Amp Turn-on      (CAN data bus)                  Power Antenna        gray/red                    LF Speaker +/-        gray/purple       - gray / YELLOW            RF Speaker +/-        dk. GREEN/ pur     - dk. GREEN/ yel            LR Speaker +/-        dk. grn/dk. blue - dk. grn/brn           RR Speaker +/-        gray/dk. blue     - gray/orange my question is; besides running a wire to the fuse box, is there another way to get a radio ignition switch wired? The aftermarket radio I'm putting in has a red wire for the ignition switch power and a yellow for the battery power -- I could wire both to each one of the Radio 12V, but this leaves the radio ON, with me manually turning it on and off, regardless if the car is on or off. I'm sort of a 'tard when it comes to these things, so please "dumb it down" for me. (By the way, what is the CAN data bus? (see I am a 'tard)).

One last thing, is there a 'Dimmer'? I see the other has N/A for radio illimuniation, I have an ORANGE wire for "Radio Dimmer", where's this go?