This tutorial is for PhotoshopCS. I don't know if it will work in any other program, especially because of how the initial shape is created. No outside shape file is needed for this method.
For those of you having problems viewing PDFs in your browser, there's a link to instructions for dealing with the problem on the page, too.
http://www.tandika.com/tandika.plx?rm=tuts
Enjoy,
Tandika*