Well Done delmarco!
delmarco: WOW! thanks for the installation instruction on the USASPEC PA12BMW. Your photo log and personal comments are impressive. I am going to install the same in my car. Was a bit hesitant until I saw your posting.
Am looking for iPod adapter for my 2002 330Ci. Installed a mini plug adapter kit a few years ago. Blitzone adapter to CD changer in trunk, wired to front. Problem is that I used monster cables to connect from the back to the front. Now I have to turn the BMW Business CD volume way up and my device's volume way up to get decent sound. It works but whoa to he that switches back to FM or CD without turning volume down.
Base on postings such as this one and a number of other reviews I'm going with the USASPEC.