Did you guys manage to get a detailed look at this *.fpl format used by the G1000 on the SD card?
Last time I checked the format looked slightly complex. Apart from the route fixes of the flight plan, I think inside the .fpl file there's a lat/long description of ALL fixes as well.
This is probably required in order to ensure integrity between the current G1000 fix database and the fpl when it was saved, in case some of the fixes changed in the meantime.