Build (FOSUserBundle) registration for a (symfony) web-app

Make a symfony bundle that extends FOSUserBundle and implement it to an existing symfony project. FOSUserBundle is already implemented and registration works just fine. What I need is the registration page to have more fields than it already has. This is a small part of a big project. This is an opportunity for me to get this small part done and also an opportunity to find a good programmer to work with for bigger parts of the project.