Vestadawg,
In my case, the show listings for Comcast's PPV channels show up just fine in the channel guide and are quite convenient to peruse. Recording a show, though, is a two part process.
First, RTV does not support PPV ordering menus, so you have to use the cable box's remote to actually order the show. Since the RTV output is buffered and delayed a few seconds, you have to be a little patient pushing buttons on the cable box's remote and give the change time to show up on your screen. Second, then just highlight the show you in the PPV channel and hit record.
DirecTV, however, is a completely different beast. They do not provide their PPV listings to Zap2it, so the PPV channels show blank info. In that case, you use the satellite receiver's remote to order the show and set up a manual record on the RTV.
At least, that's how it works for me.
Thunk