This may be obvious to you already, and you're just looking for a work around, but that tutorial is for Photoshop and Elements has some 'elements' missing. I guess that's one of them.
Sorry, but I don't have enough experience with PSE to know how, or even if, there's another way of doing it. :(
EDITED: 24 Oct 2012 08:20 by MR_BASTARD