I installed a double din into mine a few weeks ago. I have the shaker 500 so I had to wire in the 12 to 5.
They don't give you instructions on how to properly wire the 12 to 5 connector. The red/blue wire goes to the white/blue wires on the component adapter and the blue/white wire on the 12 to 5 wires into the blue wires on the main harness. Black wires into the other black wires.
FRPP HotRods Cams / American Racing Headers Long Tubes with catted X / Stang-Hi dyno tune
Saleen wheels / Steeda CAI / Corsa Xtremes, K Springs, Koni STR.Ts, UMI lca relo. Brackets/r lwr ctrl arms UMI adj. panhard bar / Camber plates / SR Strut Tower Brace.
Just installed a double din from crutchfield last Monday to my Shaker1000 and was very satisfied with their customer service. As mentioned, instructions for wiring the 12v/5v weren't given but customer service was right there even late in the night when I called and both reps were able to have me on my way in seconds.
You'll be happy with the finished product, clarity was improved a bit over the factory headunit.