this isn't like rocket science but it worked great for me. for those of you who are looking to replace your factory amps and don't want to hack up your harness or even use those cheezy crimp-on wire splicers, you might like what i did.
this worked out to be pretty easy - other than when i ran both sides of the same rca cable to the head unit :-P
instructions are here in .doc, .txt, and .rtf audiowiringtips.doc audiowiringtips.rtf audiowiringtips.txt
<img src='http://home.mindspring.com/~djgman/_530/530ism.GIF' border='0' alt='user posted image' />
02' 530i/5sp/sport/CDV/dinan stg2+CAI/UUCPhatBoy+bimmerbox.e39