Garmin map upload

I'm travelling accross Americas with my family.
I have a GPS Garmin Nuvi 1350.
In my computer I have all the Maps from Mexico to Chile but I don't know the process to transfer it on my Garmin?
Is there someone who can help or send me the procedure?
Thanks a lot.

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Mapping your Pan American highway

Hey roadtrippers - 

How do you/have you mapped your route along the Pan American highway? My friend and I are leaving Los Angeles and going all the way to Rio, Brazil this coming May. We will have 9-10 weeks to do it. 

We need guidance on how you and others have mapped and planned your route. 



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