With the latest firmware, I can finally install the AP on my car. But, upon installation to the car, the AP states "Too many maps to display, use AP manager to remove some maps." So, I had like 5 maps on there. How many is not too many?

Edit: NVM, I took the maps down to 3. BUT, when I installed the AP to the car, there were about 8 maps in there...weird, but whatever, it worked.

Yeah, mine did the same. I just took it down to 2 and after install, it was up to 12. I then went in a deleted some of the extra ones. It looks like the install process copies maps to your map section based on your car. If you had an '08, then there would be a handful of '08 maps instead.