I dont know if this is of interest to anyone, but I wanted to add some spoken seatbelt alerts but found the alerts in the 'Rome Mission' too precise.
So I have edited these to say:
seatbelts on: 'the captain has turned on the seatbelt sign, please make sure your tray table is stored and seat back is fully upright'
seatbelts off: (I normally place these on the No smoking switch) : 'The captain has turned off the seatbelt sign indicating that it is now safe to move around the cabin'.
so i have made them a bit generic, so they can be used on and off during a flight aswell. If anyone wants copies of these .wav files then let me know.