as a guy who doesnt have experience fiddling with this kinda stuff, what is the step by step process if any to go about figuring out how an unknown file format is actually made of and modifying it?

- the post itself quotes "I usually couldn’t really give them a good answer except, “Look at the decompiled code of whatever program reads/writes these files and work backwards from there.”

- i dont have the program and that is the real challenge