Downloading that file will do nothing for you. These units are still not hackable so you are wasting your time.
I'd like to try this.
Patch the firmware for the X920BT, from the AVIC site. link : http://ds1.downloadtech.net/cn1010/firmware/AVIC/AVICZ110.zip
Put the patched firmware on the SD card, Use it to update the patched files to the Unit.
Do you think this might work or not?
Thanks