no where near possible in the BF2 engine. Even if it was possible to hack the terraindata.raw file and get it upto 40kms, we would be talking a scale 40 map here, probaly more realsitic would be a scale 64 map as 64 is the closest power of 2, and then you are going to be talking about every grid square being 64x64 meters each. It would look like ****, it would play like ****, and ye, it would be ****
trying to explain a little more what I mean by grid squares is that every grid squar on the terrain had a height to it, and you basically "mold" the grids into the shape of terrain you like. Just to get an idea here is a pic of muttrah from the editor in grid mode:
http://www.rhinorage.co.uk/cutenews/dat ... es/3/1.jpg
each of thous grids are the default BF2 size, 2m x 2m. Now you can razie each grid etc to mold the shape you want, now just think with each grid being 64x64, you get the idea
not going to work on the BF2 engine, sorry.
Not saying your idea is ****, but ehhh, it just aint possible
PS. Muttrah City v2 is too real life scale.