Does anyone know whether XM's NavTraffic (real time traffic updates info shown on the navigation map) can somehow be added/hacked to the '05 Accord's navigation?

http://www.xmradio.com/xmnavtraffic/index.jsp

Seems to me this should be just some sort of firmware upgrade/mod since all the basic component for it already exist with my '05 Accord V6 Navi: the navigation unit & the XM receiver.

There is of course subscription required for this service, but I'm willing to pay for it if I can get it working with my factory navigation. I already know about the Pioneer aftermarket units for this, but since I already have the stock Nav, that's not an option I want to consider.

Thanks in advance for any help,