Following is the data needed in the aircraft.cfg file for this effect to work.
Copy and paste ONLY the two lines below for the appropriate aircraft:
Jordan Moore's
CG-HH60-2 (HoverControl)
[SMOKESYSTEM]
smoke.0=1.0,2.0,4.5, fx_fastrope.fx
To modify the placement change the numbers after 0= to get the desired placement.
i.e.
smoke.0=1.1,2.4,4.5 fx_fastrope.fx