Thank you for your post. I tried downloading and installing the the update on a Nuvi1450 but I encountered an error "Can't find the unlock record". So I looked up the the JCV and GMAPPROM file from the temp folder where it was extracted.
Tried to unlock the GMAPPROM.IMG file using FastIMG Unlocker v2.1 and copied into my Garmin GPS unit again.
Opened the unit and it shows "Can'T Unlock Maps"
The unit also shuts down when I tried to look up an address by Change State/Province.
Can you/ someone assist me to unlock the image file of CN Phil NT 2011.40 map?