This is really not needed. You can achieve the result without it.
1. Create the page that requires authentication (ok its not visible in the menu).
2. Create another page that is visible to all users
3. For the second page set the url to the fully qualified url of the first page. ie http://yoursite/yourpage.aspx
Now the second page is visible in the menu but clicking the link since it points to the first page, the user is prompted to login then redirected to teh no longer hidden page. You may also want to uncheck the "include in menu" for the first page so it doesn't appear in the menu after login since it already has a link via the second page.
Hope it helps,
Joe