AbleCommerce Shopping Cart Software

Hi, does anyone know how to implement Authorize.Net's DPM (Direct Post Method) with AbleCommerce? This is distinct from the SIM (server implementation method) and AIM (advanced implementation method). DPM works similarly to Paypal Standard in that it uses a redirect URL from a post form and then implements some javascript on return (which redirects client's browser to next step in purchase process). For business reasons, we cannot use Paypal or GoogleCheckout.

DPM completely removes our webserver from PCI compliance scope. In addition, it provides some nicely seemless methods of checkout so that user experience appears never to leave the merchant website (this is quite desireable).

Any help and/or direction would be greatly appreciated.

-hos

Would also like to know about this one. Going to check with Trustwave to see if this would bump us to SAQ-C or SAQ-A instead of SAQ-D