Hello
If i think you are talking about what i am thinking, lol, heres what you should do:
Just like Knut Erik said:
1st Name all the fire (Ex: f1 - f...)
2nd In the Trigger put this in the On Activation Field:
f1 inFlame true; f2 inFlame true...;f3 inFlame(lastnumber) use the
object inFlame true command for each fire, and seperate them by using ;
Hope that helps you, bye