Multilevel site structure?

[ken cooper]

In the Sitebuilder doc it says:

Note: In Plesk Sitebuilder, modules can be only first-level pages in the site structure, and cannot have dependent second level pages. The only exception is the File Download module, which you can set a second-level page, but you cannot depend other pages on it.

How can I build a multilevel site, i.e. parent, child, grandchild, ...?

Thanks - Ken