port from MSGina to Vista Credential Provider

I have a custom Gina to use with XP and Widnows 2000, written in C++, that is used with a biometric login application, I need to port this to use windows Vista Credential Provider I'm a C++ developer my self, and I can do this, but I'm on a very tight deadline, and I have quite few more issues to do, so I will need the help of another developer please tell me your thoughts, and PMB me, and we can discuss this further Best regards