Re: evolution of a new organ, I already provided a scenario for the evolution of the ear.
As for your second question, give us all a break, the human genome project was completed all of 2 years ago. Do you think you're being clever somehow in pointing out that the function of each piece of DNA is not yet know? Exactly which part of the theory of evolution leads you to believe that a genetic road map exists for, not just humans, but for each of our ancestors over the last 3.5 billion years?