One thing that does worry me is the way the electrical, signal, and data lines are run for the HVAC/TUNER/CD CHANGER. More and more with the advent of multi function switches (switches that do 5 different commands) the wiring is multiplex data/power/signal. So one second a single wire in the car carries +12v, the next second its ground, then it carries +5v data. All on the same line. Rendering any aftermarket stereo useless and impossible. Just look at BMW. What you see in the dashboard is just a control module and a cd player. The actual tuner and amp is in the trunk. Looks like the '03 Accord might have the same electrical engineering and blueprint.