Its very easy. No need to change anything in Codeigniter or modify the jQuery-File-Upload library (meaning that upgrades will be very simple).
- setup codeIgniter project.
- paste the controller, model and view file in application folder in your project.
- Open you core folder in application paste My-Modal.php file in core folder in your project
- paste uploads folder in your main root of project
- excute database in your server