gistfile1.aw

/**
 * Attach a file reader to config. Multiple readers are supported.
 */

Kohana::$config = new Config;
Kohana::$config->attach(new Config_File);

/**
 * Attach the environment specific configuration file reader to config if not in production.
 */
if (Kohana::$environment != Kohana::PRODUCTION)
{
	Kohana::$config->attach(new Config_File('config/environments/'.$env));
}

Thx, I'm currently using... Kohana::$config->attach(new Config_File('config/environments/' . arr::get(array('production', 'staging', 'testing', 'development'), Kohana::$environment - 1)));