WP Codex answer incomplete? Put WP in subdirectory. .htaccess change required

use ths constants for set the install and main domain of WP

define('WP_SITEURL', 'http://www.example.com');
define('WP_HOME', 'http://www.example.com/blog');

i think the htaccess is fine:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wordpress/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wordpress/index.php [L]
</IfModule>

the index.php in the root has only an require to the file of the install: require('./wordpress/wp-blog-header.php');