Here is a suggestion for you. Find a set of DS shaders that have a similar glossy/silky effect to the poser materials. Hopefully they don't cost too much, and use those as your guideline to help you port them over.

A simple silky/glossy shader base that works well with most things uses this:

Base color with or without a texture map.

Glossy color again with or without a texture map, with glossy layer set to one.

Sometimes there's a bump or normal map but not always.

Then you can use metallic flakes if you'd like or not

And top coat, if you want, I have some shaders that use it, some that don't.

You really can't copy nodes from Poser to DS even using the shader mixer.

I would also suggest using the Iray Uber base shader and then using the metallic base shader I don't remember off hand what it's called.

Sunfire's Creations