This is a small article I wrote up about securing MyBB forums. Some methods can of course be used with another forum softwares. Anyway, you can check it on my blog.
Great tutorial if you actually wrote it yourself. As I know there are many tuts like this around.
Either way it was informative, and legit. It would be even better if you told people to make a fake /admin to get people to think the acp was never moved.