A) Unzip to a temporary folder
B) copy ita_g.fx, ita_w.fg & ita_r.fx to your FS200f effects folder
C) Make a backup of the AIRCRAFT.CFG of the plane to which you want to add the smoke effect.
D) Copy and paste the following section in the AIRCRAFT.CFG.
[SMOKESYSTEM]
smoke.0=1.00, -17.00, 16.60, ita_r.fx
(it is possible that the aircraft.cfg already has a [SMOKESYSTEM] entry, replace it by the new one,
or add the new lines.)