I don't think it makes a difference whether what TV service you subscribe to. Generally speaking they all have the same channels, the only difference is what their respective numbers are for your particular subscription service. I'd be more than willing to enter that data manually, since it seems to me the hard part would be getting the metadata to the Pronto.

Maybe a shortcut would be a server program on the PC that goes to a website like tvguide.com, takes a screenshot of your personalized program guide, and then feeds that screenshot to the Pronto/client.