Creloaded Modification - file manager

need the ability to access/edit files in the "temp" folder through Admin. Basically it will list the files/folders in the "temp" folder on my website, for text files, click to open code in an online editor, user can edit the codes right there, and "Save". The file will be updated on the server. for image files, allow upload new images to the folder, and replace existing images if files has the same name. Remember user only allowed to upload image files, not text files. Text files can only be edited and saved online. It is like a simply file manager, for all files in the "temp" folder. (let admin decide the path to "temp" folder).