thats some funny stuff hahahah. well i work at the installations for circuit city and its pretty funny to hear about the problems. all you have to do to install the head unit is buy a harness and a fit kit and follow the colored wires and everything will work. as for the rear afs if u replace the deck its fine leave it alone. what it is is that the rear stock speakers are 2 ohms because if you look in the trunk near the lever to pull down the seats there is a black box. that is like a little amp for the rears. so when you replace with 4ohm speakers which are standard for aftermarket ones you need to bypass it. as for me i would just run wire to the front behind the head unit to bypass it instead of looking at the harness at the amp to see what it is
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aLwAyS lOoKiNg To Go FaStEr
2000 Crystal Blue Base Prelude
OEM Body kit
AEM CAI
EIBACH PROKIT
Dc Front Upper Strut Tower Bar
Dc Rear Lower Strut Tower Bar
Mobil One Synthetic 5w-30
AUDIO:Alpine 7965 CD deck,Mtx Thunder 304 @ 375 Watts, Mtx Thunder 302 @ 400 Watts Powering A 12 Inch Mtx 8000, and Alpine 12 Disc Cd Changer