This answer varies depending on the shopping cart you are using. Inside of most shopping carts (Not inside the EasyPayDirect.com gateway) you will find a drop down menu that gives you a list of gateways to pick from. You want to select “Network Merchants Inc” or “NMI” from this menu. Typically the shopping cart will then ask for your login information for the Easy Pay Direct Gateway.
If you are having trouble with this, please contact your shopping cart provider and let them know you are working on connecting your “Network Merchants Inc” or “NMI” gateway to your shopping cart.