Quoted from the guide: The file structure of config files follows Kohana’s file structure. Meaning that configuration files in the application directory take precedence over those in modules which take precedence over those in the system directory. The one exception is config.php which is hardcoded into the application/config directory and cannot be moved elsewhere.
A Good PHP Framework For Beginners Like Me!
A Good PHP Frameworks for Beginners Like Me! 13 April 2010 Muhammad Ghazali http://muhammadghazali.web.id/blog
What is framework I'm talking about a software framework...
What is framework A skeleton of an application into which developers plug in their code and provides most of the common functionality . -- E. Gamma, et al., "Design Patterns", Addison-Wesley, 1995
What is framework A framework is a set of common and prefabricated software building blocks that programmers can use, extend or customize for specific computing solutions. With frameworks developers do not have to start from scratch each time they write an application. Frameworks are built from collection of objects so both the design and code of the framework may be reused . - JavaFramework. 
“ Web Application Framework ”, http://en.wikipedia.org/wiki/Web_application_framework
“ MVC Frameworks written in PHP ”, http://www.phpwact.org/php/mvc_frameworks , retrieved 7 April 2010
“ Top 10 PHP Frameworks ”, http://www.phpframeworks.com/top-10-php-frameworks/ , retrieved 7 April 2010 </li></ul>
Reference <ul><li>“ Notes on Choosing a PHP Framework: A Quick Comparison of CodeIgniter and Kohana ”, http://www.beyondcoding.com/2008/02/23/notes-on-choosing-a-php-framework-a-quick-comparison-of-codeigniter-and-kohana/
“ Choosing a PHP Framework Round 2: Yii vs Kohana vs CodeIgniter ”, http://www.beyondcoding.com/2009/03/02/choosing-a-php-framework-round-2-yii-vs-kohana-vs-codeigniter/
“ Performance of Yii”, http://www.yiiframework.com/performance/ , retrieved 8 April 2010
“ CodeIgniter forum ”, http://codeigniter.com/forums/