I'd recommend the detailed information about the DDR menu on the DotNetNuke Wiki. You'll find it at
http://www.dotnetnuke.com/Resources...RMenu.aspx Start with this:
<ddr:MENU MenuStyle="SUPERFISH" runat="server" />
That should give you a Superfish menu displaying the entire menu structure.
Change it to:
<ddr:MENU MenuStyle="SUPERFISH" NodeSelector="RootChildren" runat="server" />
to show all the children of the root menu item that is the parent of the current page.
You can also replace RootChildren with CurrentChildren to show the children of the current page.
You can use the more general form: NodeSelector="{root},{skip},{depth}"
(where {skip} and {depth} may be omitted). {root} is * for the root, . or 0 for the current page, -n for n levels above the current page, +n for n levels down from the root menu towards the current page, PageID to select a particular page by ID or PageName to select a particular page by name. {skip} if provided skips that number of levels (e.g. 0 shows the selected page, 1 shows its children). {depth} if provided specifies the number of levels deep to go (e.g. 0 for just the current level, 1 to include immediate children).
So, if you want to show the current page and it's children: NodeSelector="0,,1" should work.