As long as the Atlantic campaign uses the same save game file format (which I assume it does) it would be pretty straight forward. It would still require some programming ability and the values within the mod would need to be changed to something appropriate for Great Britain and Germany.
I word of caution concerning this mod. I think it can add some interesting new ideas to the game, but in it's current form it's pretty basic.
By the way speaking of WWI, you can kind of blame that war on the slight delay in me releasing this mod.
I downloaded the demo for "Rise Of Flight" which is a pretty good WW1 flight simulator. The demo is only good for 14 days and the actual game is very expensive, so Ive been spending a lot of my computer time playing and tweaking the demo. Once I actually make up my mind concerning that game, I'll finish up this mod and release the first version. That should hopefully be sometime soon.