General Support: Integrating

you should just make a new photogallery.php file in your main directory and have it look something like this:

<?php
include("head.php");

//Plogger Gallery
include ("photogallery/gallery.php");

the_gallery_head();

the_gallery();

include("foot.php");
?>

all well documented in the doc section of the site, you can do it the way you were trying it's just way harder :)