You need to download the WebSend on the link below:
Now extract the files and install the Websend.jar on your server!
Now to configure the CraftPay is simple (WHMCS Version):
You need to download our plugin, then just extract and put the folder "CraftPay" inside the folder "/modules/servers/" of your WHMCS ready is installed.
Now simply create a product in your WHMCS and select it as the product, module and configure with IP of your server, Put the password that you configured in your Websend and put the command to assign the customer vip.