Map help, please!

[Grumbler]

I'm re-fighting the battle of Crecy, only jumped up to 1948. I found a map on the Web and re-proded it in SP. When I go to set up, the French are on the English side and vise versa. I have tried switching sides in the map editor and it either didn't work or I did something wrong. So how do I get the sides switched? It matters since the position was chosen for it's defensive abilities and the brits will need them defending against a 3 to 1 assault.