OK, things are so busy I finally got chance to do this,. and I was waiting for a gender adapter (female - female ) for usb cble to arrive.,.,, Is working beautifully BUT,. I still have thie issue of not being able to switch between sources on the sony nav head unit. Now that I hooked up the USB 2 it does allow me to do 2 sources at a time and switch between them,. but not the total 3. IS this not wierd?!? I am wondering if my sync needs to be updated or reflashed. any thoughts?