public static function exists($package)
	{
		if (array_key_exists($package, static::$packages))
		{
			return static::$packages[$package];
		}
		else
		{
			$paths = \Config::get('package_paths', array());
			empty($paths) and $paths = array(PKGPATH);

			foreach ($paths as $path)
			{
				if (is_dir($path.$package))
				{
					return $path.$package.DS;
				}
			}
		}

		return false;
	}