At this point it should be obvious, so you probably don't have any experience with editing PHP and SQL queries. Here's the line you want to edit...
Code:
$products_new_query_raw = "select p.products_id, pd.products_name, p.products_image, p.products_price, p.products_tax_class_id, p.products_date_added, m.manufacturers_name, p.products_model, p.products_quantity, p.products_weight from " . TABLE_PRODUCTS . " p left join " . TABLE_MANUFACTURERS . " m on (p.manufacturers_id = m.manufacturers_id), " . TABLE_PRODUCTS_DESCRIPTION . " pd where p.products_status = '1' and p.products_id = pd.products_id and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'" . $display_limit . $order_by;
I've shown you the door, now walk through it. Hit Google and start reading up.