How do I remove a title? First I had to add a new movie for someone and now he wants it removed. Any idea on how to do this?

Has the movie been released/showed to the public in some form? If so, it cannot be removed. If it's eligible to be added to IMDb under the current rules it's very hard to remove it. If it doesn't qualify for the eligibility rules then you can try to remove it, but I'm not quite sure how to do it, since they don't provide a form for those types of requests. You might try to send it in as a Data Verification Case, providing as much information as possible, and see if they agree and remove it.