This is probably a newbie question - but here goes. I've found on the web a lot of material presets that I would like to use. They usually come in zip form, which I unzipped in the materialsuser directory. When I open the librabry in Bryce, only the first 13 show up (the "user" material takes up one space) in the left hand column. I have downloaded about 45 materials. I would like to combine like materials, the glasses, for instance, into one category, the metals into another, etc - much like Bryce's default materials. I realize that I can import them, but that seems very time-consuming. Is there any easy way to combine materials into one category without importing? Thanks in Advance.