It’s in my pack. Number 5 if I remember correctly.
Use this tool and select “save as” when you’ve found the correct image. It should then save a png with the correct gamma.
edit: as for the sandbag, do you have the mesh, or should I rip that in 3ds max format too? Or what format do you want it? I can do this tomorrow evening. Feel free to add me on skype (powback) and I’m sure I can help you out however you may need. My internet is better now, so uploading should take no time.
edit2: Reading through the presentation above, I figured that number 5 might be the crater-depth map. Heightmap should be number 4. You’ll figure it out.