ok I'm just throwing this out there,I have no idea how to do it or if it would work but what if you made two objects. One a large "fire" and the other firefighters hunkered down.give the fire fighters zero for movement and have the fire move slow and be armed with an invisible rocket with almost no range.the fire would creep towards the firefighters,or buildings or what ever ,and when in range would fire it's weapons that just happen to have crater effects that mimic the fire spreading? that would allow "close support" missions to save the fire fighters from a fast moving blaze.....morbid but I wonder if it's doable. I guess if a suitable transport fire could be made it might be useful in armed recon missions too......