How do I add additional map to game?

[Texas 2]

example - i want to have a flooded earth map or one with really high growth rate but i dont want to change the original map

[($Jake$) 460]

The map editor is still not out - we're anticipating for a late January release of it, otherwise it will slow down scenario/mod making severely ;/

[Texas 2]

Quote

The map editor is still not out

I don't mean like changing province borders, I just want to have another copy of a map so I can use the existing tools to change it, like the terrain editor or growth rate editor, without modifying the existing map

[($Jake$) 460]

As said above, the map editor is not out yet, so unless you want to change your existing map, you can't do anything about the map. It's impossible to do without the map editor that is still to come out.