What do you mean with directory listing? Browse files and play them directly? If that is what you mean, yes you can. Playlists work too.
Did you install the skin in the right place? You have to have a folder called Skins within your RR folder. In the Skins folder make a folder with the name of the skin and extract the skin to that folder, like so:
You also have to set the skin in the RR Config, but that explains itself. Good luck.