I have a 2720, and need to get a map of Mexico. If I load this into my gps, will I be able to access all the US and Mexico at the same time? I will be riding from Mn to Puerto Vallarta. Will I be able to build it as 1 route or will I have to route to the border and then have a 2nd route? Will this all fit in my gps? I don't want to bring my laptop and have to stop and load maps.