Powerpoint organization

Does anyone know if you can put Powerpoint slides into folders or impose some sort of organization other than having everything at the same level? I'm putting together a presentation that has over a dozen distinct sections, and it would be convenient (and faster, and clearer) if I could just deal with the section I was working on. I'd especially like it if I could move whole sections around in the slide sorter as folders and not have to wait for each slide to render.