I would start poking around here...
https://combatace.com/files/category/30-utilities-editors/
There are a couple of extracting utilities available that will get you the INIs you need.
Yes, by default, the only INI you will see for a stock aircraft is the AIRCRAFT NAME.INI. You will need to extract others and place them in the aircraft folder.
It might also help to look around here regarding modding questions.
https://combatace.com/forums/forum/8-modsskinning-discussion/
You could also browse the aircraft downloads and see if someone may have done something similar to what you want to do. You could then examine those INIs for hints and tips.