Add the SMOKESYSTEM text to the corresponding aircraft.cfg (and save it) of your favourite POSKY 767, A330 or 747..........or why not go crazy and add it to all of them?!! :o)............
OPERATION:
Hit the "I" key while flying to see them..........or alternatively go to menu and select Aircraft----->Smoke System and make sure there is a check mark next to this!!
You are welcome to play about with the numbers............
That's it bro's........enjoy. Post a screenshot or two, why don't ya ;o)?!!