@Castus
Here are all the other necessary files from an NA 3597. Extract directly to root of your nuvi: [Only registered and activated users can see links. ]
You'll also need to add a basemap to .System folder. Download V5.01 from here: [Only registered and activated users can see links. ]. If you aren't offered TZ map by WU/GE [it should be offered though], you can dl V15 here: [Only registered and activated users can see links. ].
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