I need help building a height based shader for terrain. Can somebody please help me. I am using Jan Sandstrom's tutorial but I can't seem to follow it properly.

I will try and post a pic of the shdaer network I am trying to recreate. It is Jan's shader.

Or if someone has a better way to do it. I currently use a shader called Grassyknoll. I am not sure who made it but It is quite good but it doesn't create snow and rock exactly how I would like.

I will be forever gratefull!!