Super Smash Bros. Ultimate Ripping Project

[VirtualTurtle]

Soooo... Can anyone explain the trick to putting together the texture layers for a model (such as the col, nor, etc.)?

On the 4th page I have a video showing the whole texture process

I'm following the instructions well, so far, but I've run into a road block with the Node Editor portion. 
I don't know if it's because I'm trying to implement it onto a Mii Costume, but there are no nodes that show up, and I can't add any shaders.
I'm using Blender 2.79 as you are, so I don't know what I'm doing wrong.

If you're not using Cycles Render, that could do it. At the top it should say Cycles Render instead of Blender Internal. If that's not doing anything, then you don't have a material selected.