Create PHP class to insert multiple customer/order records for user testing

I need a class created (consistent with Opencart) to be able to insert at any time multiple customer and order records for load testing. Each customer should have a random name (eg. selected from a pool of firstnames/lastnames), and random address (New Zealand only). Also, I need each of these customers to automatically have \"Pending\" orders available. The idea is that I can use big datasets for testing queries for further customised development. The developer should use the default Opencart (latest) framework for developing class. I will simply call the class via a local cron job using curl eg. [login to view URL] (or similar) - so no buttons or anything required in the admin :)