A protector for a LCD screen is pretty much universal as long as it fits. I've tried a myriad of different materials ranging from the sticky clear sheets used to laminate paper to scotch tape to the PSP protector sheets. I've never damaged a screen sticking weird stuff to it but I've had loads of scratches from grit on a unprotected screen.

The only thing you have to watch out for it is to (as others have noted) avoid shoving the protector underneath the edges of the screen, thus applying constant pressure and rendering the digitizer unusable. Scary the first time you do it and wonder if you've ruined something, but merely an annoyance the next time. The Pelican PSP protector I used is wonderful because it's rigid enough to pull up and reposition easily without destroying it or introducing bubbles.

The worst material I've ever tried is the paper laminating sheet; it will leave a terrible gummy residue that only comes off using isopropyl (rubbing) alchohol.