The disk image is available via their website but requires your VIN number. I poked around a past update and it appeared to just be a *nix disk image.<p>Wasn&#x27;t sure if it was signed or if there was much security or not so I wasn&#x27;t brave enough to change anything for fear of borking my car.<p>But I would have loved to figure out how to enable the nav system that&#x27;s already built into my car but disabled (Jeep charges $XXXX for the privilege)