HELP I WILL THUMBS UP :)

You have been assigned to lead a large software development project. The project has several elements which everyone considers to be high risk. In addition, some of the requirements are not completely defined. The customer contract representative is very interested in your companys ability to demonstrate quick results to ensure that his companys senior management will continue to support and fund the project. What software development method would you propose to use and how would you implement the project?