Etwas

        Zend_Loader::loadClass('BugModel');
        $bugsTable = new BugModel();
        $bugsRowset = $bugsTable->fetchAll();
        $bug = $bugsRowset->current();
        echo "<pre>";
        $userbug = $bug->findParentRow('UserModel');
        $comments = $bug->findParentRow('BugCommentModel');
        echo "bug_id:" . $bug->bug_id;
        echo " from User: " . $userbug->user_firstname;
        echo " with a example comment_id: " . $comments->bug_comment_id;