Poser by it's self does not have a way to insert part of a material shader set.

your options are to make/modify the material the way you want it then:

1. right click in the material area and choose "sellect all" to hilight all nodes. then go to each materal in the figure and paste your new stuff.

2. use the copyMAT python wacro (http://www.ralf-sesseler.de/d3d/) to copy your material to any other material zones you like.

3. Get ShaderSpider and use Copy to material group.

Note: the 3 options above require you to make/modify the material for each type of texture. so you will have to add the blinn to a body texture, and to a head texture and copy them to the material zones that use the same texture.

4. your other option is to Use ShaderSpiders partial shader to wedge your blinn into the textures which sounds like what your trying to do.

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