Well... I was thinking. to put pages into sub level directories and sub-sublevel directories is not very wise. Every time you add or delete a page you will have to rebuild the menu for that directory. If you have four levels then you will have four separate directories.

It is far better to put you graphics in as many subdirectories as you desire and keep all your HTML for the root. Then you could usea nd call just one menu.

Personally, I have had about 5000 HTML pages in the root with no problem.