"some of them have exclamation marks (!!) before them, why?" Because their creators want these files to come on top of your list in the explorer or in Poser libraries list. Some put more than one in order to get on top of all the list, including the exclamation marked ones. So far, in my Runtime's textures files, Galana leads with 3 "!" in a row. I guess that, by 2010, most files will begin with 10 "!"...