photonPWG is a plugin which allows PhpWebGallery (a photoblog) and wordpress integration. All seems to be one, your users won't see any difference!
Photon require cURL, a php library which is installed on most server. However it is not on EasyPHP. To make it works, it is hovewer very easy. Just click on EasyPHP menu->Configuration->Extensions and click on php_curl.
Yes, to do that, just go into phpwebgallery admin menu and give a maximum width in "default display" (for default and for the users parameters). Choose a width that suits your theme and them do a database maintenance and synchronize additionnal informations on your pictures to update the width value.
Sorry, I did my best but, for now, photon canít work with drop down category list. You will have to change your theme.
Please search my forum (http://www.jillij.com/) first and try to find your solution in the already answeared questions.