Brian, I've read through the article you linked to.. thank you!

My question is, how do you get the amp "coded" for your car? Is this done at a dealership? or is there software and a computer connection i can get?

Lastly, I'm having problems with my audio setup in my 2002 X5. I believe everything is hooked up to the amp (the PO had installed an aftermarket amp and so i've been in the process of splicing the wires back to the original harness) but i dont get any sound to the speakers. i've checked the 2 blade fuses in the trunk but is there a relay that could be the problem? when the amp is connected i get the DSP button on the nav screen so i think it's recognizing it properly.

THANK YOU for any help you can give.

Nate