Looking at some of the voting things, there seems to be a number of people looking for miracles. I know hypnosis works, but some people seem to be expecting things that I can't imagine working. ie, the social files, that make you outgoing and interesting. You have to learn to be interesting, it's not locked away in your mind right now.
And singing voice could only come about if you have a knowledge of what a good pitch is, etc. Lots of people think they sound good, that their voice is very musical, when it really isn't. You may be able to get your voice to a point where you think it sounds good, but other's probably wouldn't.
Correct me if I'm wrong, but some of these files can't change you unless you have the knowledge base, or research into something. Of course, I could just be being a dick and ruining peoples hopes of an easy change.