ok so i bought a 09 journey R/T loaded but w/out the nav system .. ( i wanted one but refused to wait to order one)

now i have a question

i have a MyGig REW to my understanding that's a European MyGig system. Why would i have a REW? second .. isnt the REW supose to have NAV ?

and another ? my software is only 9.11 how do i update it and what is the newest publicly released update?

edit: never mind dang my failing eyes its a REN