The code that Dizzi provided is the actual PZ2 you would use to accompany your "Display Only" PNG.  Simply copy and paste that code into NotePad then save it with the same name you plan on using for the "Display Only" PNG, however give it the extension PZ2 when you save it.  Your "Display Only" PNG will carry the extension PNG.

And yes, the PNG and PZ2 files work as a team..... the PNG file needs the accompanying PZ2 file in order for it show up in the library.

-Pandorian

Pandorian's Website.... aka......