Now you need to populate the actual hoof shader. I'm not going to get into this too much just now. All I'm going to talk about is how to set up image maps.

For each image map you intend to use in the shader, add a node and connect it to the place that indicates its purpose. Here I've connected to Diffuse_Color, Specular_Color, and Bump.
 

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)