75392 payment script add in feature

I have a payment gateway full source script buy from [login to view URL], and i need payment system specialist to modified the script to add in a new feature. I need it to have a jont venture account type, which 2 or more members can join to open an account, when $ send to this account, the fund will pay to them automatically , according to the % they hold. i need to know how can you do it, and its still a secure system after the modification. Programmer need to have experience/knowledge about payment gateway script and process, i welcome any suggestion to make it possible, but only budget bids are welcome! i also need a secure tools for joint venture account holders to know about any change on the payment link that have setup,when a preset payment link/page has been move to another server or domain, it will send mail to account ownners to tell them about the change, or any other suggestion that can give security to join venture partners. All payment received/activity can show on members personal account control panel, or generate a link in the personal account to view the join account activities. or i will pay extra if someone can make it to accept payment from non paypal accepted country (by 2checkout or other) and transfer it to my paypal account to pay for the ebay auction item as they request, if the process can go automatically. Please let me know anything that not possible to do, i will understand. thanks