[firebrand media]

The "eval" makes me think this is a 3.x solution.

My attempt at a 4.x update: (Template names have been changed to protect the idiotic)

if ($vbulletin->userinfo['usergroupid'] == 1)
{
$templater = vB_Template::create('my_custom_login');
print_output( $templater->render());
}

Still hooking at global_start.
I have a full-page template called my_custom_login.