I used to have a similar problem with my ReplayTV. I travelled around the country for about two years for the contract I was working under and I carried a ReplayTV with me wherever I went. I was usually in one place for about 4 weeks at a time which made it worthwhile. Unfortunately, the hotel chains I stayed in (ExtendedStay America) had a proprietary channel lineup that they pulled from the satellites that didn't correspond to any of the local cable systems. I just looked for a local cable lineup that contained all the same channels that were picked up on my room TV and set up the Replay accordingly. This allowed me to at least get the guide info for all the channels I could record in my room.
I made up a cross-reference list that compared the cable channels to the actual channel numbers the shows were being broadcast on in my room. I would have to set up almost every show I wanted to record manually but I was able to at least record them. If a show on the channel I wanted happened to be scheduled at the same start and stop time as a show in the guide then I just picked the show out of the guide for ease of recording. Of course, the show title didn't correspond to what was actually recorded but I was able to keep pretty close track of the recorded shows based on the date and time of the recording.
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