Anyway to add Xfinity VOD to Roamio Basic OTA?

I have two TiVos: (1) Roamio Basic that I use for OTA recordings and (1) Roamio Pro that I use for Comcast recordings. I like how I can go back in many cases to all seasons on certain shows now with Xfinity VOD on my Pro. On my Basic, there isn't an option for Xfinity VOD. I was hoping there would be and I'd be able to input my Comcast login credentials, like I did for Hulu and Netflix, so I could have Xfinity VOD on my Basic unit as well.

Has anyone attempted to do this and figured out how to get Xfinity VOD onto a Basic unit that uses OTA? I was wondering if I could temporarily put my cablecard into the Basic, set it up for cable to see the Xfinity VOD and then revert back to OTA and see if the Xfinity VOD "stays" as a streaming option.

Thanks in advance for any ideas or suggestions or definitive answers.