Thank you Mark, I usually do a back up on everything Im doing but I forgot to do a back up on the aircraft cfg. I will be doing that from now on and then switching back to the original when I want to fly a Flight Deck 5 mission. I did reinstall the Flight Deck5 and did a little editing to use one of my other aircraft ( default Cessna 172 with original aircraft cfg file) and it worked just fine. I was also able to carry out the mission using the Flight Deck 5 weapon which were some cool "cluster" bombs. Thanks again for the help.                   Dan