I know the PPP/Lightwave plugin actually has Lightwave duplicate and transform the meshes into LWO files. As long as you don't rename anything, you can completely change the settings of the materials and it will work. Furthermore, it doesn't change anything in the original Poser files. Do these three plugins work the same way?

Before they made me they broke the mold!
http://home.roadrunner.com/~kflach/