Not sure if this would work for you but try splitting the cable before Moto box. Take new "direct" cable and plug it into your Ant RF (the other going on to Moto box). Wait 24 hours and see if that populates the TVGuide. This works in some markets (your profile doesn't say what city your in). Worth a shot, especially since it is free (if you already have a splitter and extra length of cable). Otherwise, I imagine you can use cablecard and cable box, you have to change inputs based on which one you are watching (and having to pay fee for card and cable box which stinks!)
Good luck.
Adam
Good luck.
Adam