80136 PHP Update Script

Hi, I am looking for a PHP/MySQL script that I can add to my HTML pages easily enough to edit basic things like images and text. Kind of like a WYSIWYG thing with an admin that is accessed via an "owners login" link on the bottom of the pages. I am open to your guys suggestions on developing these update scripts as I know there are many ways to do so. I am after a simple but powerful solution to delivering updatable content to clients without having to know to much about the PHP myself and the client only having to upload, retype, and drag in drop from IE. I will purchace this script off you to have full rights to implement as I will, I will also give credit where credit is due on my own website.