template with in a template

[BBR-APBT]

This is for my switch this makes a error.

case "add": 
$templater = vB_Template::create('Site_Glossary'); 
$templateradd = vB_Template::create('Site_Glossary_add');
break;
default: $templater = vB_Template::create('Site_Glossary');
}

// ###### NOW YOUR TEMPLATE IS BEING RENDERED ######


$templater->register_page_templates();
$templater->register('navbar', $navbar);
$templater->register('pagetitle', $pagetitle);
$templater->register('glossarynav', $glossarynav);
$templater->register('templateradd', $templateradd);
$templater->register('show', $show);
print_output($templater->render());
?>

I remember you could do

$templateradd = fetch_template('Site_Glossary_add');

Now this outputs

$final_rendered = 'blah ';

I am calling it with in the template using

    {vb:raw templateradd}

On the new page it should show the new template with in the first template.

P.S. I am trying to have all one php page