Richard (aka the Plodder) did an excellent overlay for Google Earth of all the Battle for the bulge maps a long time ago.
The link for them used to be on the Matrix site, but I have been looking for it for you, and can't find it anywhere?
Setting the camera in Google Earth to what you want, then printing the screen would be a good method for what you are after I think.
You could also set it into a 3D view if you wanted.
Another method, that I use, is to take a screen capture of the game by pressing the print screen button on your keyboard.
This copies the screen to your clipboard, where you can then paste it into an image editing program of your choice, and either print it as is, or do your planning on there with the paintbrush tool.