I've done a lot of work with TG2, and while I'm no expert and many people in the forums beat me hands down, it does make things easier if you've done it before. :-)
Attached is an improved version of the .tgd that I used to create that scene. This one is the source of the images I'll be posting shortly (they are still rendering). When you load it, it will be missing the tree objects and the heightmap - substitute your own or make a random fractal terrain. The map is not 1:1 scale, the highest mountain peaks should be at most 500 units (anything above 400 will be covered in snow). Water level is at 0.
You can use this file as a start if you want to work on shaders or the TG2 end of the project.
