How to organize the nautilus bookmarks in the "Places" panel applet?

There seems to be no configuration dialog for the Places menu in the panel.
Yes, I know how to add, remove or change the order of the bookmarks in nautilus.

But I want to use folders and subfolders for the bookmarks. With more than 20 entries the nautilus bookmarks and the places menu become inconvenient.

• any editor for this?
• any configuration file that does the job?
• any other tool than the standard places menue?
• any extension for nautilus to extend the bookmark organization?

Solution 1:

AFAIK, Places/Nautilus Bookmarks don't allow for sub-folders. While it might not be exactly what you're looking for, but since you ask for other tools file-browser-applet might be useful for you. It allows you to browse through folders from the GNOME panel.

Solution 2:

I think that the philosophy behind nautilus places is that it should be kept flat, simple and short