I have downloaded and installed the files on my Nuvi 765t and it seems to work great. Although I have no way of knowing if the lane assist function will work until I guess I actually approach and see the lane assist function. My question however is regarding the Mexico map you have posted. I have downloaded it and installed it on my SD Card (I put the other files on the internal memory of the unit) but when I check Map Info, I don't see the Mexico map at all. What am I doing wrong?