Integrate Zaxaa IPN/PDT with my member plugin and Keycode delivery script

Details: There are 2 components to this project which are listed as A and B below A) Integrate Wordpress member plugin with Zaxaa IPN to register purchasers as members Task Description: I am using Zaxaa payment processing and affiliate platform for payment processing via PayPal. Zaxaa has its own IPN (named ZPN) and PDT available for members. I need to integrate this ZPN/PDT with my wordpress member plugin so that after processing of sale in PayPal the ZPN/PDT will send the sale data to the wordpress member plugin to create the new member (including adding member ID level). The wordpress member plugin does have an API that can be utilized for this purpose. B) Integrate my IPN Activation Key delivery script with Zaxaa IPN and/or PDT Task Description: Using Zaxaa payment processing and affiliate platform for payment processing via PayPal I need to integrate the Zaxaa ZPN/PDT to send post PayPal sale data to my custom Activation Key delivery IPN script (this script works fine when initiated using the PayPal IPN directly,..but Zaxaa overrides the PayPal IPN and so I need to reintegrate it into the Zaxaa IPN/PDT system). This should be a simple task to a competent programmer experienced in PayPal IPN protocol and WP plugin API integration. I need this job done within the next few days and so I will award the project based on experience and availability. The successful coder will be invited to engage in more work of this nature for us on future projects pending now