CyberSource integration into Invision Power Board subscription manager!

TIMING: Need this done ASAP. Will select someone once there is a good bid from someone with experience in both INVISION POWER BOARD and CYBERSOURCE payment gateway. Please be honest. BUDGET: If you have experience in both items and can provide in a couple days, I will be happy to pay $150. DESCRIPTION: Invision Power Board comes with a few pre-installed gateways for payment processing, but we don't use any of them. I have a CyberSource account that needs to be setup and integrated into IPB so that new users can pay (using credit cards) for their subscription to the message board. REQUIREMENTS: As mentioned, you must have experience with INVISION POWER BOARD and CYBERSOURCE. Also, you MUST document the files you create or change, and save back-ups of the originals. I need to have an accurate listing of exact changes in each file so that I can duplicate the changes if I upgrade the IPB software later. Commenting and documentation is ESSENTIAL.