Hi folks I'm in need of your help please, I'm not really very good with computers a find all this rather difficult and frustrating.
I've downloaded City Navigator North America NT 2015 and wish to put it on a new SD card to use in my Nuvi 270 when we visit the USA this summer.

After down loading and un zipping I'm left with this [Only registered and activated users can see links. ][Only registered and activated users can see links. ]

I've read a lot of tutorials here today but just seem to be going around in circles.

What files should I copy from the unzipped downloaded to an SD card.
As the original down load is locked what do I need to use with Jetmouse to unlock the map or whatever I copy to the SD card.

As you can see I'm really stuck.
Thanks for taking your time to read this. any help will be greatly appreciated