I can imitate that menu style, but what do you want displayed in it exactly?
Categories as the top level items, sub-categories as the second level (ie: the highlighted ones in the dropdowns) and sub-sub categories as the third level menu items? If so, then yeah, I can’t see any problem with doing that.
You would just have to make sure that the sub menu items displayed horizontally and that the flyouts became dropdowns below the second level menu items.
I don’t intend to add this as an option to the CSS generator any time soon though, maybe next year, but unlikely to be before (and possibly never). But I’m available for custom jobs and would be keen to tackle something like that. Get in touch via my contact page if you are interested in pricing information.