protected function _generateAllScaledImages($overwrite = false) {
        $imageScaler    = new Garp_Image_Scaler();
        $templates      = $imageScaler->getTemplateNames();
        $success        = 0;

        foreach ($templates as $t) {
            $success += (int)$this->_generateScaledImagesForTemplate($t, $overwrite);
        }

        return $success == count($templates);
    }