Are there any tutorials around to help with converting Poser mat poses to Daz Studio?

I've been working on a series of textures recently and would love to support D|S, but the tutorials I've come across have been very basic. (I've been going nuts trying to find tutorials on this for the last week, but I guess I don't know what to search for.)

How do I deal with - in Poser terms - specularity? I want to add shiny! to some textures but ... um... things go incredibly wonky?

Also, are there any tutorials that explain shaders? I would love to experiment and see what I can come up with, but I don't even know where and how to begin.
Thanks! And sorry for the hassle.^^;