I would highly recommend this aid to any GM who is planning to run Black Devils Brigade.
The Google Earth file marks out all of the important hills and locations, neatly divided into the Chapters of the adventure so you can quickly mark out what you need, and I've found it a great tool to increase the understanding of the terrain and its layout.
Plus, I've used the file to quickly zoom in on the area the player characters are in, and with a quick tilt I can give them (and more importantly myself) an excellent understanding of the topography of the area.
Coupled with Google's street view it will help in descriptions of the area for those who are not all that familiar with Italy.
It's a very useful tool - easy to install, and it is well put together and easy to use even if you only have a basic understanding of Google Earth.