PHP XML Editor

We need someone to create a PHP script to edit XML files online We have only 1 XML file that has nested nodes and we need a PHP-based editor with the following features: - Admin user authentication - Image upload (some nodes are URLs of images) - Add, Edit, Delete items under the same node structure The UI should be user-friendly and live updating (such as using AJAX) and should take into consideration that the XML file has nested nodes with unique IDs. I think this is a fairly simple job and I need someone who can do it urgently