After researching for the last few months on and off, and a few misc. posts on this forum and bimmerfest, I've completed wiring my 2001 325i sedan with Bluetooth AND snap-in adapter for my Motorola v600 AND hard wired to the shark fin for improved external reception.
I uploaded the enitre DIY to some web space that I have.
Check it out and let me know what you guys think.
Thanks to everyone who helped answer all my questions, etc.
BTW, the whole kit ends up costing around $800, $650 of which goes to Advanced Autovations who supplied the majority of the kit!
Oh, If anyone has any of the part # for the antenna cable PLEASE send it to me... I still need to run that!