Problema su PrestaShop moduliu

Sveiki,

Bandau pritaikyti nemokama moduli savo reikmems, kadangi visiskai neturiu patirties moduliu rasyme, tai prasau jusu pagalbos :)

Modulio pagalba yra pridedamas papildomas tabas su lauku, mano atveju Video URL.

Reikiama informacija atkeliauja iki product.tpl, taciau kaip ta pati lauka grazinti i product-list.tpl faila?

Kiek issiaiskinau, reikia naudoti hookActionProductListOverride, taciau man su juo nelabai kas gavosi

public function hookDisplayAdminProductsExtra($params) {
   $id_product = Tools::getValue('id_product');
   $sampleObj = Belvg_Sample::loadByIdProduct($id_product);
   if(!empty($sampleObj) && isset($sampleObj->id)){
       $this->context->smarty->assign(array(
           'belvg_textarea' => $sampleObj->textarea,
       ));
   }

   return $this->display(__FILE__, 'views/admin/sample.tpl');
}

public function hookActionProductUpdate($params) {
   $id_product = Tools::getValue('id_product');
   $sampleObj = Belvg_Sample::loadByIdProduct($id_product);
   $sampleObj->textarea = Tools::getValue('belvg_sample');
   $sampleObj->id_product = $id_product;

   if(!empty($sampleObj) && isset($sampleObj->id)){
       $sampleObj->update();
   } else {
       $sampleObj->add();
   }
}

public function hookDisplayFooterProduct($params) {
   $id_product = Tools::getValue('id_product');
   $sampleObj = Belvg_Sample::loadByIdProduct($id_product);
   if(!empty($sampleObj) && isset($sampleObj->id)){
       $this->context->smarty->assign(array(
           'belvg_textarea' => $sampleObj->textarea,
       ));
   }

   echo $sampleObj->textarea;
}

Tai niekas neturit patarimu? Ar as cia kazko per daug klausiu, kad nemokamai gaut atsakyma? :)