на ocStore 1.5.4.1 меня устроил Deadcow SEO с небольшими доработками:
/admin/model/module# deadcow_seo.php
private function makeSlugsRUS($string, $maxlen = 0, $noSpace = true, $source_langcode = null) {^M
global $session;^M
$newStringTab = array();^M
// $string = strtolower($this->_transliteration_process(trim(html_entity_decode($string, ENT_QUOTES, "UTF-8")), '-', $source_langcode));^M
if (function_exists('str_split')) {^M
$stringTab = str_split($string);^M
} else {^M
$stringTab = $this->my_str_split($string);^M
}^M
$numbers = array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "-");^M
foreach ($stringTab as $letter) {^M
// if (in_array($letter, range("a", "z")) || in_array($letter, $numbers)) {^M
$newStringTab[] = $letter;^M
// } elseif ($letter == " ") {^M
// if ($noSpace) {^M
// $newStringTab[] = "-";^M
// } else {^M
// $newStringTab[] = " ";^M
// }^M
// }^M
Комментим, и мета и теги он генерит на русском.