[Rommel]

What you might want to do is look for some of the playermade maps of the stock ones - (Stalingrad 2, Crossroads 2 etc) and take those apart. The harder way is to make your own map, but ultimately, you'll learn 50000% more than you would by just working with other maps. On the other hand, if you really just want to change one or two things, then go the route you're after. Good luck.