mail merge simulation on php/mysql web site(repost)

I'm looking to providing a mail merge simulation on my web site to prevent users from needing to have MS Word (mail merge) or similar program. I would like my web site to provide the following: -gui? like that of Word / Mail Merge -users can create text for mailer and save these letters to database -users can create text for envelopes and save to database -mapped fields are automatically populated? based on records from the database.? this is the main functionality of mail merge in which a user can map fields of a database (in this case mysql) to fields of the letter & envelope which will be automatically populated. *must be able to export in pdf, doc / rtf *must be written in PHP (not asp) **UPDATE* **the type of editor should be similar to:? <[login to view URL]>? you can see a live demo of this by going here:? <[login to view URL]>? and navigating to Generate Letters page.? If a text editor similar to freetextbox is used, there should be no HTML displayed at the bottom of the text editor (i would like it to be hidden)