Free Checkout for Certain Customer group

Hi there,

I was wondering if a certain module exists.

I have two customer groups, public and stores. I have a deal setup where I invoice other stores at the end of the month, so I do not wish for them to finish checkout with the paypal payment gateway. I would like free checkout enabled for this group.
But I do not want free checkout enabled for the public.

Is there a module that will currently do this. I tried searching but found nothing close.

Thank you

Yes I have the right module for your purpose:
Custom Payments
Module comes with English & German language files.