Magento Payment Module

I need a Magento payment module created to process payments using a Guatemalan payment API. This API is tested and working 100%, but I need it integrated into a payment module for magento 1.4.1.1. The winning bidder will receive the full code with examples of this API plus PDF documentation on the API. I require the final module in ZIP format with directions on how to get it working on the final Magento install. I need the Key, and KeyID to be editable by the end user in the magento module editor and I require them to be able to publish or unpublish the module from using it. This is a time sensitive project sort of, 24 hour turn around needed. But for one module for someone who knows Magento shouldn't be too hard. This is very simple, just a simple payment module to post to API url and get returned avs and cvs. Update order on magento is it was successfull. That´s it.