Question: I feel like an idiot for encouraging the way the entire plot of this movie is laid out in the questions page, but, how do the pirates know exactly what they need to do to lift the curse? Does Aztec gold come with an instructions manual or something?
Answer: It is very plausible that the curse of the gold is a legend that many have heard. Of course, not many would believe it, and when the pirates realised what was happening to them, they believed it and knew what to do.
Answer: The Aztec chest has inscriptions on all of its sides. After Barbossa and the rest realized that there indeed was a curse, they went back to Isla de Muerta and learned how the curse can be undone, by deciphering the inscriptions. This is when William Bootstrap Turner decided that they all deserved to be cursed and remain cursed and then sent one piece of the gold to Will, his son, living in England.
Super Grover ★