[Typo3] HMENU of subpages on every page example?

[Matthew Manderson]

Regards!

Does anyone have the typoscript for a HMENU showing the subpages to the
current page without resorting to either:

1) Adding a content element in the page content on every page.
2) Adding an extension template to every page with subpages 
just to add temp.subnav.entryLevel = 1

I need something user proof so when users add deeper levels of hierarchy the
menu will stay updated.

Thanks.
Matthew