Since 2.6, you've been able to define a new location/name for the wp-content folder.
define('WP_CONTENT_DIR', '/path/to/wp-content');
define('WP_CONTENT_URL', '/url/to/wp-content');
It would be great if this plugin could support that. :)
Also, the custom image page suffix that zenphoto lets you add to your gallery pages is missing from the thumbnail URLs (.html, .php, etc.).
Great plugin otherwise. :)