Integrate Payment Provider

Hello, we are looking to use a payment provider that is not listed in the settings -> payment options.  How does one begin to integrate a custom payment provider?

Thanks!

Really need to get going on this one... can anyone shed some light, point me in the right direction? Much appreciated mates.

Update: I sent an email to Boonex support which took about 7 days to get a reply from.  What a joke.  Anyways, the unsigned response I received is even more enlightening and lacks major professionalism.

Boonex should certainly provide support for integrations, as its good for the whole of the community.  And as I have read here in these forums and as I wade through the broken links in your support area, the lack of technical support and lack of documentation is well below "par" for such a robust application.

Higher-ups, if you are listening, you really need to pay close attention to the support-side of your software development.  Products that do not have adequate support have a flash-in-the-pan lifespan. Be smart Boonex.