STS Use for the change as shown below.
catalog/includes/modules/sts_inc/general.php
//osc_template TAG
//$sts->template['headertags']= "<title>" . TITLE ."</title>";
//$sts->template['headertags']= "<title>" . tep_output_string_protected($oscTemplate->getTitle()) ."</title>";
// Header Tags for novices w/STS v4.3.3 BOF
if ((isset($cPath) && tep_not_null($cPath)) && (!isset($HTTP_GET_VARS['products_id']))) {
// Header Tags for novices w/STS v4.3.3 BOF
$sts->template['headertags']= "<title>";
$sts->template['headertags'] .= (strlen($breadcrumb_tags->trail_tags('')) > 0) ? TITLE . ' - ' . $breadcrumb_tags->trail_tags(' - ') . ' - ' . $cat_tags[title_tag] : TITLE;
$sts->template['headertags'] .= "</title>\n";
$sts->template['headertags'] .= "<meta name=\"description\" content=\"";
$sts->template['headertags'] .= htmlspecialchars($cat_tags[desc_tag]);
$sts->template['headertags'] .= "\">\n<meta name=\"keywords\" content=\"";
$sts->template['headertags'] .= htmlspecialchars($cat_tags[keywords_tag]);
$sts->template['headertags'] .= "\">\n";
} elseif (isset($HTTP_GET_VARS['products_id'])) {
$sts->template['headertags']= "<title>";
$sts->template['headertags'] .= (strlen($breadcrumb_tags->trail_tags('')) > 0) ? TITLE . ' - ' . $breadcrumb_tags->trail_tags(' - ') . ' - ' . $header_tags[title_tag] : TITLE;
$sts->template['headertags'] .= "</title>\n";
$sts->template['headertags'] .= "<meta name=\"description\" content=\"";
$sts->template['headertags'] .= htmlspecialchars($header_tags[desc_tag]);
$sts->template['headertags'] .= "\">\n<meta name=\"keywords\" content=\"";
$sts->template['headertags'] .= htmlspecialchars($header_tags[keywords_tag]);
$sts->template['headertags'] .= "\">\n";
// Header Tags for novices EOF
} else {
//set default
//default keywords for the index (home) page
$kws_page_default .= HEADING_TITLE;
$kws_home_default .= STORE_NAME;
//default Description for the index (home) page in your laguages
$desc_home_default = TEXT_DEFAULT_DESCRIPTION_TAG;
$sts->template['headertags']= "<title>";
$sts->template['headertags'] .= $kws_page_default . ' - ' . TEXT_ADD_DEFAULT_TITLE;
$sts->template['headertags'] .= "</title>\n";
$sts->template['headertags'] .= "<meta name=\"description\" content=\"";
$sts->template['headertags'] .= htmlspecialchars($desc_home_default);
$sts->template['headertags'] .= "\">\n<meta name=\"keywords\" content=\"";
$sts->template['headertags'] .= htmlspecialchars($kws_home_default);
$sts->template['headertags'] .= "\">\n";
}
// Header Tags for novices EOF
ADD :
catalog/includes/languages/your languages.php
define('TEXT_ADD_DEFAULT_TITLE', 'your meta title');
define('TEXT_DEFAULT_DESCRIPTION_TAG', 'your meta descriptin');
catalog/includes/application_top.php
search:
//add category name to page title
if (strlen($categories['categories_name'])>1) $header_tags[title_tag] = $categories['categories_name'] . ' ' . $header_tags[title_tag];
replace:
//add category name to page title
if (strlen($categories['categories_name'])>1) $header_tags[title_tag] = $header_tags[title_tag];