Dominions in Westeros--Scenario Help Request

[Robert Lawrence James]

Hi! I have been playing SP for a while, and a few MP games among friends, but nothing online.

We are fans of A Game of Thrones (HBO series and series of books, for those who may not know), and want to set up a Westeros Dominions game. If anyone on here is a fan of the series and has ideas for which nations to stand in for which faction, or can help us figure out how to use the map creation function, many thanks.

Obviously, this would be a more high-fantasy reimagining of the world of the series.

My ideas:
Stark: EA Ulm
Lannister: MA Marignon
Wildlings: MA/LA Jotunheim
White Walkers: EA Helheim
Daenerys/Dothraki: LA Tien Ch'i
Highgarden/Tyrells/Renly: LA Man
Stannis Baratheon: LA Marignon
Dorne: Machaka?
Iron Islands/Greyjoys: LA Vanheim
Night Watch: ?

Also, I was trying to figure out how to upload a picture and turn it into a map, and how to assign a specific nation to a specific starting spot, but I can't figure out how. Any help?