[{HVY-E}Jinxx]

I created a mission like this with B-17's flying from England to Rouen at 25000 ft. using 32 planes. All I did was put in 8 individual planes with alt varying from 24800 ft. - 25200 ft. Once the planes were in place, I opened the .mis file and edited the flights manually. If you want to add another bomber stream, you can copy the entire flight data for the first 8 flights and duplicate it in another location by changing the map location data for the flight. It's not easy if you don't know what you are doing, but it is very fast once you get it down.