Australian PayPal Gateway.

I have a Payment Gateway Module that is Uses a BusinessID and Token to access PayPal via API/IPN in a PHP script. Seems that this process won't work in Australia for a customer of mine. I'm looking for someone with [login to view URL] experience to help re-code my script to the new standard that is required in Australia . I could figure it out, but do not have the time to waste on PayPal Documentation. I'm in the US and my logon takes me to US PayPal developer section and not PayPal.Au. I will not under any circumstances hand out any PayPal Credential. I want code that utilizes variables for the credentials (example $BusinessID= {BusinessID Goes Here} and I will code those from my end via database lookup. If you ask for credentials, I will automatically exclude you from this project. I have max $75.00 for this project. I need something before Sunday June 9