How to add separator to main window menubar, right justify Help menu?

We have switched from Qt 3.x to Qt 4.x and are having a problem with the Qt 4 designer.
In Qt3's designer we could add a separator between menu bar menus, in Qt 4 designer
this does not appear to be possbile. Our apps require the 'Help' menu to be separated
from the other menus such as:
[File Edit View<------separator-------->Help]
How can we use the Qt4's designer to achieve the separation, current the menubar
looks like this:
[File Edit View Help ]
Thanks for any pointers,
Todd