Maybe this has been posted before, but I could find the answer using the search option. If you want to start from the ramp in a single mission. edit this line in the MSN File. Change Waypoint[01].Command=TAKEOFF in to Waypoint[01].Command=TAXI   [AircraftMission001]
Name=SHOWTIME
AircraftType=MiG-21bisN
Size=1
Alignment=ENEMY
RandomChance=100
MissionType=RECON
TargetArea=Bad Hersfeld
ObjectiveID=5
RatingForSuccess=50
StartOnGround=TRUE
CarrierBased=FALSE
Position=569000.000000,557000.000000,500.000000
Heading=239.487961
Speed=207.887314
StartTime=0.000000
BaseArea=Köthen Airbase
LandArea=Köthen Airbase
Waypoint[01].Command=TAXI
//Waypoint[01].Command=TAKEOFF
Waypoint[01].Position=568081.500000,557000.000040,0.000000
Waypoint[01].Size=100.000000
Waypoint[01].Speed=202.929993
Waypoint[02].Command=DEPART
Waypoint[02].Position=559147.825109,554563.392422,3048.000000
Waypoint[02].Size=1500.000000
Waypoint[02].Speed=202.929993   Notice the different "Tower" command (Tower taxi to runway 27 etc)