HeatHaze+ALShader to apply to yellow/orange only?

I am a total programming noob, and I'm trying to use reshade with a game that has a lot of snow and im using a flamethrower there as well. I want the heathaze effect controlled by ambient light to be applied ONLY on Yellow/Orange flaming colors instead of every bright color on the screen. The game is quite old so it doesn't have any depth. I'm getting heating effect on the entire screen due to bright snow. I tried to understand something from all the 3 related shader files but I have no idea what or how to do this.

Any help?