Nick, here's the tutorial from avic411.com...
http://www.avic411.com/D3Bypass/album0.html
this has worked 100% of the time that it has been done correctly... my guess is that something was not done to 100% completion... did you rotate the metal tab on the black/yellow mute wire, and did you hear it click when you installed the wire? Another question, and no offense, but did you make sure you put it in the correct hole... (no pun intended)
I was supposed to be in Baltimore in January, but never made it up there, but I will DEFINATELY be in New York for 5 days (March 19th - 23rd). In an ycase, I'm staying at the Marriot Marquis Time Square
So, if you will be in "The City" at any point during that time, and want to swing by, I'm sure I can fix it for you and get rid of that parking brake wire message! Just let me know!