I think it is the easiest swf viewer on the net. I did not like the buttons, so I compiled a new zviewer.swf (it is open source) with new buttons.
See attached!

Great add-on which works on my entry.
I love it!

This add-on is just what I needed for a client site that needed to view pdf files online. I used it to add regular text plus pdfs to pages.

Works great.

Thanks