Installation and Configuration

First extract the downloaded file into the CKEditor’s plugins folder. Then enable the plugin by changing or adding the extraPlugins line in your configuration (config.js):

Defining Configuration In-Page
CKEDITOR.replace( 'editor1', {
  extraPlugins: 'imageuploader'

Using the config.js File
CKEDITOR.editorConfig = function( config ) {
  config.extraPlugins = 'imageuploader';

Don't forget to set CHMOD writable permission (0777) to the imageuploader folder on your server.

Check out the Documentation or the Plugin FAQ for more help.