[toltion]

Just add "ORDER BY $sql_tbl[extra_fields].orderby")" to the end of the SQL query in products.php to use the sort order -

if (!empty($active_modules["Extra_Fields"]) && !empty($products)) {
foreach($products as $k => $v) {
$products[$k]["extra_fields"] = func_query("SELECT $sql_tbl[extra_fields].field as field, $sql_tbl[extra_field_values].value as value, $sql_tbl[extra_fields].service_name as service_name, $sql_tbl[extra_fields].active as active FROM $sql_tbl[extra_fields], $sql_tbl[extra_field_values] WHERE $sql_tbl[extra_field_values].fieldid = $sql_tbl[extra_fields].fieldid AND $sql_tbl[extra_field_values].productid = '$v[productid]' ORDER BY $sql_tbl[extra_fields].orderby");
}
}

I also added "$sql_tbl[extra_fields].active as active FROM $sql_tbl[extra_fields]," so I can still specify to show the field value if it's active right on the .tpl.