I have two categories defined:

Site-Root and Dropdown


Under Site-Root I have content pages 1-4 as top level xowiki pages, and a dropdown menu containing five subordinate pages. The structure is:

Site-Root
    page01
    page02
    page03
    page04
    Dropdown
        paged01
        paged02
        paged03
        paged04
        paged05


Site-Root is an invisible category so that I get a horizontal menu. It looks like this:

page01  |  page02  |  page 03  |  page04  |  Dropdown
                                               paged01
                                               paged02
                                               paged03
                                               paged04
                                               paged05


For user interface design reasons I need the layout order to be:

page01  |  page02  |  page 03  |  Dropdown  |  page 04
                                    paged01
                                    paged02
                                    paged03
                                    paged04
                                    paged05

I have racked my brains and tried various ordering numbers in the Section field, but I cannot work out how to do this. 
The page ordering seems to work perfectly within a category, but is there a way of specifying that a subcategory
(and its children) should be listed in between sibling items that are not categories?

Richard