CD Receiver Install Question

I want to install my Pioneer DEH-P3600 cd player in my 00 GT w/Mach 460 this coming week. I see that Crutchfield has a Scosche OEM Amplifier Adaptor so you can use the factory amps w/aftermarket head unit. Some of the reviews on that product aren't so re-assuring. Anybody know how I could install the Pioneer and still use the factory amps w/out using that Scosche adaptor? If worse comes to worse, I can buy the adaptor, but i'd like to bypass it if it's possible. Thanks for any Info
Todd
 
I had that piece of crap. Didn’t work at all. Sounded like crap so I ran all new wires and put in aftermarket amps.

When I installed a different head unit on my sisters Acura with a Bose system there was one of those adapters and it made the sound quality horrible after calibrating it. So we just by-passed that and hooked the wires up directly and it sounds great. These adapters are a waste of money and time IMO.