This may be an unorthodox method of imparting such information, but I have created a Story- Form set of instructions that details how to add a five digit pass-code to your games for the purpose of pass-coding Unlockables, Game Sequels, or the like.
As it’s a technical work (and rather dry) to anyone not specifically looking for the information, I am not going to publish it – but you can reach it at the following link.
Feel free to post questions and/or comments about it here or in the “game” itself.
BZ