I have a 2011 Town & Country with the RBZ radio and I want to upgrade it to the one that has the Garmin gps built in. (I think it is the RHB.) Will it just work once it's installed or are there adapters that I need to purchase for it to work? Also, if I buy one off ebay that came from a Jeep, is there a way to change it so it says Chrysler? Any help would be appreciated. Thanks!