I know there are a lot of hooks in WP for altering a posts content (and other fields) before the post is written to the DB upon saving; but what I am interested in doing is running my custom filter before the post is *loaded* for *editing*. So basically when my custom post type is loaded by /wp-admin/post.php?post=##&action=edit, I would like to run my filter on it before the content is displayed in the WYSIWYG editor. Is that possible or no?