How to create a map 'template'

Hi there!

I would like to know if there's a way to take an existing map (on which I have created a road network) and make a 'map mod' (a map with which I can start a new city) in Cities XXL? I've taken a flat map and (in the game) created a city with road network that I would like to use to create several new cities (all based on the same map and road network). Is there a way to 'copy' this city so that I can use it to create a new city (using the same map, of course) from the initial city-creation screen in the game? Or is there another way to achieve the same kind of thing (copy & rename the save folder, for example)?
I don't want to have to create the same road network several times over, in different cities, from scratch, on the same flat map. I also don't want to create an entire new map mod from scratch.

 

Wow, thanks! I didn't expect it to be as easy as that!