What you need to do is make two pages. One of them has your content--design
it as you normally would. Then make a frames page. One that has two columns
or two rows will work fine. Delete one of those columns or rows, leaving
just a single frame. In design view, you can tell FrontPage which page the
frame should initially load.
What this is supposed to accomplish is this--when the user clicks "source"
on the view menu, the code that comes up is your frameset page, not the page
you're trying to protect. But the truth is, this will deter all but the most
casual code-viewers.
Furthermore, you should note that the right-click disabling script that the
page you linked to advertises is very easy to defeat. Simply press and hold
your left mouse button, then press and hold the right mouse button. Release
the left mouse button, then release the right mouse button, and ta-da, the
standard right-click context menu comes up and you can view the source or
save the image. A better bet might be to find a script that replaces the
right-click menu with another menu instead of trying to disable it.
It all comes down to what you're trying to protect. Some sort of little
navigation button that you plaster everywhere is probably not that important.
Professional-quality photographs like you see on Corbis probably are worth
trying to protect....and in that case, you might as well do what Corbis does
and put a very disruptive watermark onto the picture.