I posted this on the other forum as well, but I wanted to make sure everyone saw it.
Now the Z2 can be used while driving, just like the Z1. The guys over at avic411 packaged a nice update disc for us. I just tried it on mine and it worked fine:
AVIC411.com :: View topic - AVIC-Z2 Pre/Post-June Bypass Files
I used method 2 because I have a Z2...
Enjoy!
Dave