contact msn yahoo gmail grabber

We have a user registration process on our web site that we would like to expand. Once the user completes our site registration process they will be given an additional option of informing their contacts of our site and services. The user will be prompted with a screen that allows them to enter their hotmail username and password on hitting submit an automated process goes to their hotmail account and retrieves their entire address/contact book. The user can select email addresses that they would like to receive an automated email from our siteinforming them about our site. We would also like this functionality for yahoo and gmail? accounts too. Similar processes are already in place in facebook. Some class exist like <[login to view URL]> You must be able to understand or have already do this kind of job. I need it in php. I repeat what? I need is just two fields for username and password with the button that retrieves adress/contact and after you must list them, the user choose the adress he wants send invitation and click on send button and a mail is send. thank you!