I think the simplest way is as Apple Slicer says!
No scripting is needed, but you need to start learning scripts if you are asking for help with scripts as the forum will not do the work for you!!
So to get the fire effect you can set up the fire, and add the light marker, select your colour, I've used yellow in my example, and change it to dynamic, and change the main script to light2.fpi, this will give you a flickering effect, so you need to find the right position for the light in front of the fire to cast the right shadows, see the video attached, just a quick one but hopefully will show you the effect it can give.
Far too new to be helping...