Setup Registration Page & Link to Pay Gateway

We have a website already completed based on Joomla. One of the page is the registration page for customers / participants to register themselves to participate in any programs hosted by us. We need you to setup this page and link it to the payment gateway. The pay gateway is a malaysian gateway, and they have the necessary documentations / api required. Its called the iPay88 [login to view URL] Attached the file of how the page should function. We also have a sample site that you can follow. Kindly suggest how you plan to implement this. If you are not an experienced person who knows how to get this done, we encourage you not to bid, thank you. Our budget is USD100-150.