I have enabled the Pay pal module as a checkout option but I need to add a new option for the customer to request an invoice. I realize I need to modify some rules but it seems that the first item I need is a Payment method which the customer can choose that will fire off the Billy invoice. I have looked everywhere but cannot seem to find a suitable method. Should I use the Exmaple paymnet method and try to modify this?
Cheers /bo