Well, my step-daughter returned yesterday and said that while the Lufthansa people she dealt with at FRA were extremely nice, they were unable to book her on the earlier flight. They claimed to be thwarted by the reservation system, which apparently would allow them to switch her baggage to go on the earlier flight, but not her because of the cheap fare she had. In any case, she said they tried really hard to make it happen, but were unable to, and were very nice to her about it.