For those of you wanting smoke like Matt Younkin, here are the coordinates.  Just copy this "SMOKESYSTEM" to your aircraft.cfg  and replace RASDecath_SmokeWhite.fx with whatever aircraft's smoke that you already have installed that you really like. As you know,  to operate the smoke use the stand "I" button on the keyboard or whatever key you have assigned to smoke effects.

 

 

[SMOKESYSTEM]

smoke.0= -7.0,  -8.0, -1.0,  RASDecath_SmokeWhite.fx     
smoke.1= -7.0,   8.0, -1.0,  RASDecath_SmokeWhite.fx

THX for the nice Mod, just a little hint:
in P3D 4.x the aircraft "Extra300S" is automatically installed and its aerobatic smoke can be used

[SMOKESYSTEM]
smoke.0= -7.0,  -8.0, -1.0,  fx_smoke_ala300P3D    
smoke.1= -7.0,   8.0, -1.0,  fx_smoke_ala300P3D