Magento: Get all Mail Templates used in Config

<?php
$dir = dirname(__FILE__);
chdir($dir);
require $dir.'/app/Mage.php';
Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);

$configSections = Mage::getSingleton('adminhtml/config')->getSections();

// look for node entries in all system.xml that use source_model=adminhtml/system_config_source_email_template
// they are will be templates, what we try find
$sysCfgNodes    = $configSections->xpath(Mage_Adminhtml_Model_Email_Template::XML_PATH_TEMPLATE_EMAIL);
if (!is_array($sysCfgNodes)) {
    return array();
}

foreach ($sysCfgNodes as $fieldNode) {
    $groupNode = $fieldNode->getParent()->getParent();
    $sectionNode = $groupNode->getParent()->getParent();

    // create email template path in system.xml
    $sectionName = $sectionNode->getName();
    $groupName = $groupNode->getName();
    $fieldName = $fieldNode->getName();

    $paths[] = implode('/', array($sectionName, $groupName, $fieldName));
}

$change = array();

foreach ($paths as $path)
{
    $val = Mage::getStoreConfig($path, 2);

    Zend_Debug::dump($path);
    Zend_Debug::dump($val);
    
    if($val){
        $tmpl = Mage::getModel('core/email_template')->load($val);
        Zend_Debug::dump($tmpl->getTemplateCode());
        //Zend_Debug::dump($tmpl->getTemplateText());
    }
    
    echo ('<hr />');
}