Download GMapCatcher Tile from external storage

As the title mentioned it,
i would like to load the GMapCatcher tiles form an external storage and use it as offline configuration (only GPS available).
The main purpose is if tomorrow i want to use my app on another location i can download the associated map without recompiling the whole application.

I need all of it working on Android devices.

I try to log the Tile.zoom, Tile.x and Tile.y on the CustomDownloadTile.cs script but the values doesn't match with the folder's names.

Can you explain me how i can achieve a such task ?

by the way, thanks for your plugin, it's just awesome !!!