Is there like an editing program or anything? Any info would be helpful.
You will need these programs:
1. Notepad++ (Or similar program, but Notepad++ is recommended)
2. Paint.NET (Or similar program, but again, I recommend using Paint.NET (Ignore this if you're not going to edit textures))
3. And Lucas' Pure3D Editor, for editing P3D files!
Firstly, you might want to peek into original game's scripts (without editing them!)
to understand why are they working
Secondly, there are multiple tutorials available here
Also, don't be afraid to ask if something went wrong!
Hope I helped somehow, best of luck!
How do i setup the files, like where would i put the .ini files and stuff?
A little thingy named "Basic Mod Template" exists. It's, well, a mod template, with everything already setted up and ready to be replaced
You can get it here