fx_ files questions?

I am working on developing some stuff in the effects files. I am interested in doing some things other than what I have found info on. I can't find the info I want in the M$ FX SDK that explains this stuff.
I have seen in some FX files commands listed occasionally that are like Sound=1. Is it possible to play a sound file out of a general FX file? How do I do this? Where do I have to put the actual sound file? Is it just .wav files that work?
I have seen things like the command Fire=1. What is that about? Also Light=1. What's that?
Ther are a few other commands that I have seen that are not listed in th SDK. Are tehre a bunch of "hidden" commands? And if so..... is there a list somewhere?
Now a big question that is really important to me with something I am working on right now........
Can I use the [controller.X] command in a fx_ file called from the [smoke] section of the aircraft.cfg file?
I have tried... but it doesn;t seem to work. I want to make sure that it is not something ELSE that I am doing wrong ;).
Appreciate the help.
best,
..................john
I have seen in some FX files commands listed occasionally that are like Sound=1. Is it possible to play a sound file out of a general FX file? How do I do this? Where do I have to put the actual sound file? Is it just .wav files that work?
I have seen things like the command Fire=1. What is that about? Also Light=1. What's that?
Ther are a few other commands that I have seen that are not listed in th SDK. Are tehre a bunch of "hidden" commands? And if so..... is there a list somewhere?
Now a big question that is really important to me with something I am working on right now........
Can I use the [controller.X] command in a fx_ file called from the [smoke] section of the aircraft.cfg file?
I have tried... but it doesn;t seem to work. I want to make sure that it is not something ELSE that I am doing wrong ;).
Appreciate the help.
best,
..................john