Figured out the LED back lighting. The extended harness does have the pink wire that was labeled illumination, so that was not the problem. Go into your setting menu, under the general tab is an option called light detection. Turn this to OFF. Then go to the LED tab and choose your color. The back lighting will be on. At least it is on my wife's X5. Since you have DSP and it makes everything much more difficult, I would buy an aftermarket amp and scrap the DSP amp. The twisted pairs of wires are your speaker connections. You would just need to figure out which wires went to certain speakers. An RCA patch cord run from the head unit to the amp would simplify things. Anyway, good luck with your install and thanks for the help.