In addition to the Miva Merchant package you will need a Miva license key in order to install Miva Merchant on your domain. If you already have a Miva license key select the "I already have a Miva Merchant license key" radio button and click the "Next" button to complete the operation. If you don't have a license key, you must purchase one. Select the "Miva Merchant license key" radio button and click the "Next" button to proceed. Follow the instructions to complete the operation.