I've been playing around with the Export View for the Garmin KMZ option - but having searched the forums and manual, I still don't understand what 'current view' versus 'maximum detail' does - as when I checked them, and exported both options, they created the same image file in terms of size, etc.
I was hoping that the max detail would extract multiple tiles at the 1024x1024 size - essentially allowing me to make the large maps on the handheld instead of having to manually create the individual tiles. However, I see from the beta forum that that is something that was discussed for another coding session.