The problem isn't that there aren't guides, the problem is that people aren't sharing where the code they changed was located. Think about it, put yourself in the shoes of someone who doesn't know the location of absolutely every file and string of code, who comes across a mod that does something similar to what he wants. Maybe he'd like to go poke around the file and change a few things too, that's the best way to get started, but he has no way of knowing where the code came from.
Sure if you're making a big mod and changing a lot of things you can't be bothered to keep track of every little thing, I just came from modding the heck out of Guild 2: Renaissance I know how that goes, but if someone is asking for a single simple change it would take practically nothing for the person posting the mod to say "This was in CoreRaceConfigs.xml".
Instead people are basically saying "here insert this into your My Games/Elemental folder" and that's great for people who just want to play the game, but incredibly frustrating for people who don't already know where everything is and would like to just jump in and start looking around modding and tweaking things.