From post #1:

To use the junction view files, drag the entire “JCV” folder into your “Garmin” folder.( x:\Garmin\JCV )
or
JCV in a subfolder called JCV on the SD Card
A friend abroad has a nüvi 1490. We know that the map IMG file does not go into a folder 'Garmin' but in a folder 'Map', whether it be on the unit itself or on a microSD card.

How do I interpret the term subfolder as the place for the JCV file?
Would that be the X:\Map\JCV folder or would that be the X:\JCV folder? (X: being the drive designation for either the nüvi or the microSD)