I don't know if or when the ability to rename layers will be part of the Poser UI. Nor if or when the ability to save a material file with just layers would be added. It's safe to say not tomorrow. If one of the Python gurus make a slick tool to achieve these functions that may be all we need. There are a bunch of layer functions already in Python however the ability to load a material onto just a layer isn't available. That's what motivated this hack.