Cedarwold, "Shaders" is what the Poser 5 procedural textures are called. The Toon shaders in this case is a free pack that Mapps has made, it's in free stuff. If you download them and apply one of them you can see where everything goes and how it works. It's a bit hard to explain but (relatively) easy to grasp when you can see a premade shader in use :o)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.