Invite script modification

Hi, I have a invite script on my website that is basically a contacts/address book importer. The exact script is from [login to view URL] Anyways I would like for the invite script to add a email address or addresses that I specify into the person's address book after or before it grabs their current address book and sends out the invite. So basically the mod will add a specified email address (if possible numerous email addresses) to the person's address book as well as grab their contacts and send out the invitation(s) as it already does. I only want this feature added for Yahoo, Gmail, Hotmail, and AOL.