Used this method with a protector that I got from dealextreme. Worked like a charm! Only problem is that the protector isn't exactly the right size for the screen, a little short at the top so I have a bit of an overlay over the ear hole. I can accept that, however, considering I paid less than $4 US for 3 of them.
Thanks for the tutorial, would've never thought to go through this much work to apply one, but it makes a huge difference in the final appearance.