Im desperately trying to get navigation in my vehicle. Not a fan of using my phone while driving or the portable Garmin GPS. I recently attempted to have navigation installed into my vehicle at my local Dodge dealer but was told that I have a RE2 radio and it is not compatible with the software. I was told that RE4's and all models after have navigation pre-installed. I asked one of the tech guys if it's possible that a 3rd party somewhere can do it and he says that it's possible but he couldn't give me a solid answer. I life in Los Angeles, CA and would like to get this navigation installed. Can anybody help?