But to answer your question. If you want to do the conversion yourself (as a learning exercise) then you will need to isolate the flap part, export it to a modelling tool (FSDS, GMAX etc) re-create the animation so that it is correct and then re-attach it to the converted model.
Thank you Gavinc....Will have a look....Think I will pass on the conversion technigue Now for a DA Question. The model folders are called (1)HTAI C208b CP_P3Dv4 etc on the converted folders and the original was called model and model.cp. Do I need to change the model name for a cp to HTAI C208b CP_P3Dv4 in the aircraft cfg for all 256 textures...whew.