Adding engine smoke help

[mfaulisi]

Those guys with more experience than me, how can I add the automatic smoke effect like this?

http://m.youtube.com/results?q=t-38%20s ... ANavlzT_ag

I get the adding after the after burning smoke ones, but is this using a gauge possibly? I'd love to have some old school smoke on the T-38A.

Thanks

[Travis]

Hmm.  Can't get the vid.  All I get is a search on YouTube. 

[Ricardo TV]

Did you try to past it in the aircraft.cfg? you can add them there and during flying pressing I the smoke should appear, normally it should to only appear when the engine is running, some planes not. but the some on the video is impressive, would like to have it for my concorde