Man, I can send you links on how to synthesize nitroglycerin and mill your own AK-47 receivers if I wanted to. Assuming you're in the United States, there's nothing wrong with writing such a guide. Worst case scenario, which won't happen, is that Square-Enix will send you a C&D order hoping it'll scare you cause really, there's nothing they can do. If they try, there's no law founding their case and they'd probably end up paying for your lawyer, so you don't lose anything and you gain a good laugh.