I think the CSS generator stops at four levels, maybe five but I can’t remember. Do you want more than that? That is an awful lot and will become difficult to navigate with any more. If you need more, then you will need to sign up for our ‘premium membership’ option and I can add extra menus for you on request.
Or are you just wanting to go from a dropdown to a flyout? In which case it depends on what you have in your menu. If it is WordPress pages, then you just need to change the page parent of the pages you want to appear at a lower level. The page parent option is available below the wysiwyg box when you are editing the page (in WordPress 2.5+).