Change checkout to SIM method

We are using both this and your Payment forms. In today's hostile security environment, customers no longer want credit card numbers to be even typed on their websites, let alone stored. All major e-commerce developers allow us to force checkout to the payment gateway. All transactions occur offsite. This lowers the customer's PCI compliance liability to close to zero. We need to do that in order to keep using this software. Is it possible?
Thank you,
-Jim Gribble

I see that you sell a separate Authorize.net SIM plugin. That's what we need. But we also need to enact SIM for your Payment Form extension. How do we do that?
-Jim Gribble