I have been having problems wrapping my brain around how to properly utilize the modular extension for Codeigniter. From what I understand, modules should be entirely independent of one another so I can work on one module and not have to worry about what module my teammate is working on. I am building a frontend and a backend to my site, and am having confusion about how I should structure my applications.

The first part of my question is should I use the app root controllers to run modules, or should users go directly to the modules by urls? IE: in my welcome.php

public function index()
{
  $this->data['blog'] = Modules::run( 'blog' );
  $this->data['main'] = Modules::run( 'random_image' );
  $this->load->view('v_template', $this->data);
}

public function calendar()
{
  $this->data['blog'] = Modules::run( 'blog' );
  $this->data['main'] = Modules::run( 'calendar' );
  $this->load->view('v_template', $this->data);
}

My second part of the question is should I create separate front/back end module folders

-config
-controllers
  welcome.php
  -admin
    admin.php
-core
-helpers
-hooks
-language
-libraries
-models
-modules-back
  -dashboard
  -logged_in
  -login
  -register
  -upload_images
  -delete_images
-modules-front
  -blog
  -calendar
  -random_image
  -search
-views
  v_template.php
  -admin
    av_template.php

Any help would be greatly appreciated.