Flex - multi level context menu

Hi All,

I'd like some help/direction on creating a multi level context menu.

I have got the code for adding items to the main menu working:

var item:ContextMenuItem;
item = new ContextMenuItem("MyMenu",true,true,true);
item.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT,myMenu);
Application.application.contextMenu.customItems.push(item);

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Problem now is that I want a few levels to the context menu:

MAIN -> Item 1
              Item 2
              Category 1 ->
                        Item c1-1
                        Item c1-2
              Category 2 ->
                        Item c2-1
                        Item c2-2
                        Item c2-3

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Any help and examples appreciated.

Thanks