It says that P3do exporer pro's viewer can view .pz3, so it look's like the answer is yes...

see this page... http://www.senosoft.com/p3doproFileFormat.php?soft=pro

Also you might want to look at this script on PhilC's python forum... Apparently a script to render out a .png for a .pz3. I myself never got it to work but I think that was just a formatting error on my part. Might be useful if dashing off a preview render is too tedious.