Photon 4.2.1 (non official release) by @jcberthon
You can find an updated (and non official version) of Jillij Photon plug-in for WordPress. It now works with PhpWebGallery 1.7.0.
This plug-in is licensed under the same condition as the original one: GPL
Instructions are included in a readme.txt file in the package.
If you are on Windows (XP or Vista), you might want to try 7-zip to open the previous archives. 7-zip is free of charge and is free (as in freedom). It has many advantages compare to the built in archiving facility of recent Windows release.