I've set it to <NotOnlyUnallocated/> since only unallocated was duplicating the icons I chose. The icons selected for the new folder were kept in "more..." aswell. However I do not see why my first attempts got the menu stuck... Could it be because: 1) the main menu does not allow more than 15 items? 2) empty lines between the main menu and new folders have to be removed in “hildon.menu”? 3)what is the relevance of "bb_apps", does the name of the new *.directory matter?
Each <Menu> may contain any number of <OnlyUnallocated> and <NotOnlyUnallocated> elements. Only the last such element to appear is relevant, as it determines whether the <Menu> can contain any desktop entries, or only those desktop entries that do not match other menus. If neither <OnlyUnallocated> nor <NotOnlyUnallocated> elements are present, the default is <NotOnlyUnallocated>.