[Zope] Creating folders in LocalFS

I have a LocalFS object within a directory, and in the same directory I have a method which I want to use (among other things) to create new folders within the LocalFS object, which is called "pictures." If I try pictures.manage_addFolder(id) the folder gets stuck in the directory it is called from, not in pictures. There doesn't seem to be any specific docs on this, so I am at a loss. Any pointers would be greatly appreciated. --Aaron