Worldpay COORPORATE GATEWAY module for Zen cart

Hello We are using Zen cart 1.36 and are looking to make a Worldpay plugin for the Worldpay "Corporate Gateway". the standard module provided in zen cart site is for the "BUSINESS GATEWAY". We have been using the business gateway but are going to use now the "Corporae gateway". Please find below the php files and example code provided by worldpay ([login to view URL])