My b2evolution Version: 2.x

The default way of the menu is to add static pages horizontally one after the other. Thus it is not possible to add more than 3-4 pages - not only because of the limited space, but more would render the menu unusable anyway. But I need some 20+ pages besides the blog, so a dropdown scheme would make a lot of sense, and I also would like to have the pages sorted into 3-4 menu item dropdown lists.

I browsed through a lot of the skins available on the web, but couldn't find an example which provides a customized dropdown menu. If there is one, could you please provide me with a link, so that I can check how this could be done. Or, if there is none, is it possible at all and how could it be done?