// Inside your auto prepend file


if (ereg( 'MSIE ([0-9].[0-9]{1,2})',$_SERVER['HTTP_USER_AGENT'],$version)) {
  $ie_browser=$version[1];
}
if($ie_browser < 7) {
  ob_start();
}



// Inside an auto append file //

if($ie_browser < 7) {
  $content = ob_get_clean();
  $pattern[0] = '/(\<q\>])(.*)(\<\/q\>)/';
  $replace[0] = '&ldquo;${2}&rdquo';
  echo preg_replace($pattern, $replace, $content);	
}