You need to go into each aircraft's data.ini and specify the pilot you want. This is from Wrench's site (and in the KB too? I haven't checked)
If you haven't extracted the data.ini for the aircraft you wish to modify, do so. If already extracted, open up the **data.ini for your aircraft of choice. In the example below, we are using the F-100D -- Find the section marked crew, as below:
// Crew ---------------------------------------------------------
[Pilot]
SystemType=PILOT_COCKPIT
PilotModelName= *
Position=0.00,4.15,0.88
SeatModelName=seat_f-100
SeatPosition=0.00,3.98,0.45
MinExtentPosition=-0.25,3.52,-0.30
MaxExtentPosition= 0.25,4.83, 1.09
CanopyNodeName=canopy_frame_rear_outer
* = left blank in this example
If your data ini does not have the line:
PilotModelName=
You =MUST= add it. Then, you can add the pilot figure of choice. Remember, it is case sensitive, so if it's "PILOTAF" you must use all capitals. If it's "PilotCH", you must use the upper and lower case lettering. Adding ".lod" is NOT required.