The unfortunate problem is that you are not at a comfort level to simply take the textures you have and recreate the MAT Room nodes to give you something that you can render correctly.  There is more to just plugging primary nodes into the PoserSurface; there are other factors to consider like displacement maps, bump maps, etc.  This is not intuitive if you are not knowledgeable enough.  And I am pretty sure most advanced users would strip out the old and replace with new to make the textures better.