Here's the unit disassembled.
I plan on installing it in my G6 with extension cables to a USB plug, an IR eye, and a line in jack on a panel so I can use either a USB drive or line in and use the remote for any functions needed. Once it is tuned to a frequency, I can hide the main unit near the antenna and leave it there and just plug in whatever drive I want to it, turn on the FM (I never listen to the radio, only CDs) and listen.
Edit: I'll be hardwiring it to the same circuit as my radio since it has almost zero power draw. (Also, the radio doesn't shut off with the key, just when you open the driver door, so I don't want it to shut off prior to that.)
The G6 has a Driver's Information Center in the stock radio, and although there are aftermarket replacements (built into a dash kit), I am sticking with the stock stereo. The speaker outputs are fed into a Fosgate 400.4 amplifier, then out to the fronts (CDT's) and a single sub (Treo TSX 12") in the rear. The real system is in the other car.
As promised, here are the pics...
Pic 1
Pic 2
Here's a tip - never turn the volume on the transmitter over 10 (out of 15). I hooked it up to my main receiver in the house and tested it for a while, and setting the volume at 10 stopped the distortion problems completely. They are very noticeable at 15 (the max), and gradually decrease from there. You just have to turn your radio up higher.
I hope this helped/informed someone.
Or at least satisfied their curiousity.
A few more pics...
Pic 3
Pic 4