COPY TO SENT FOLDER

Hi! I would like to ask help regarding my PHP script for sending out mails and then making a copy of that sent mail to the Sents mailbox. I have been working a sort of "workaround" for this by creating a "Cc:" to myself and then performing an imap_mail_move to my INBOX.Sent folder. But the problem with this procedure is that the "To:" header that will be seen in the Sents folder would be my email address instead of the legal recipient. Is it possible to re-write the headers? Are there any procedures in performing this option for web-based email? -Jhun-