Sometimes when you install a new osCommerce module, either a payment, order total, shipping modules, it does not show up in the store. If you are a programmer you may have noticed that modules file name is not being included in the “installed” constant like MODULE_PAYMENT_INSTALLED, MODULE_ORDER_TOTAL_INSTALLED, or MODULE_SHIPPING_INSTALLED.
All you need to do is make sure the sort for all of the installed modules is unique. The module should show properly in the osCommerce store.
