нашел файл handler.php - Корень → modules → shop → payment → system
внес свои поля
public function createOrder()
{
$oShop = $this->_Shop_Payment_System_Model->Shop;
$this->_shopOrder = Core_Entity::factory('Shop_Order');
$this->_shopOrder->shop_country_id = Core_Array::get($this->_orderParams, 'shop_country_id', 0);
$this->_shopOrder->shop_country_location_id = Core_Array::get($this->_orderParams, 'shop_country_location_id', 0);
$this->_shopOrder->shop_country_location_city_id = Core_Array::get($this->_orderParams, 'shop_country_location_city_id', 0);
$this->_shopOrder->shop_country_location_city_area_id = Core_Array::get($this->_orderParams, 'shop_country_location_city_area_id', 0);
$this->_shopOrder->postcode = Core_Array::get($this->_orderParams, 'postcode', '');
$this->_shopOrder->address = Core_Array::get($this->_orderParams, 'address', '');
$this->_shopOrder->addressdom = Core_Array::get($this->_orderParams, 'addressdom', '');
$this->_shopOrder->addresskv = Core_Array::get($this->_orderParams, 'addresskv', '');
$this->_shopOrder->surname = Core_Array::get($this->_orderParams, 'surname', '');
$this->_shopOrder->name = Core_Array::get($this->_orderParams, 'name', '');
$this->_shopOrder->patronymic = Core_Array::get($this->_orderParams, 'patronymic', '');
$this->_shopOrder->company = Core_Array::get($this->_orderParams, 'company', '');
$this->_shopOrder->phone = Core_Array::get($this->_orderParams, 'phone', '');
$this->_shopOrder->fax = Core_Array::get($this->_orderParams, 'fax', '');
$this->_shopOrder->email = Core_Array::get($this->_orderParams, 'email', '');
$this->_shopOrder->description = Core_Array::get($this->_orderParams, 'description', '');
$this->_shopOrder->shop_delivery_condition_id = Core_Array::get($this->_orderParams, 'shop_delivery_condition_id', 0);
$this->_shopOrder->shop_payment_system_id = Core_Array::get($this->_orderParams, 'shop_payment_system_id', 0);
$this->_shopOrder->shop_currency_id = $oShop->shop_currency_id;
$this->_shopOrder->shop_order_status_id = $oShop->shop_order_status_id;
$this->_shopOrder->tin = Core_Array::get($this->_orderParams, 'tin', '');
$this->_shopOrder->kpp = Core_Array::get($this->_orderParams, 'kpp', '');