WordPress and add-on domains

Hi, I have WordPress install files stored in inaudible.co.uk/blog with the WordPress address URL as https://inaudible.co.uk/blog and blog address URL as https://inaudible.co.uk/crimea .

I have the index page at inaudible.co.uk/crimea , using the following index.php code:

<?php
/* Short and sweet */
define(‘WP_USE_THEMES’, true);
require($_SERVER[‘DOCUMENT_ROOT’] . ‘/blog/wp-blog-header.php’);
?>

and this .htaccess also in /crimea:

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

# END WordPress

now my question: I’ve just created an addon domain (myaddon.co.uk) to point directly to inaudible.co.uk/crimea, so going to myaddon.co.uk is effectively the same thing (note it’s not a redirect). what would i have to do to get wordpress set up so that going to myaddon.co.uk will show my index page as it does at the moment with inaudible.co.uk/crimea ? would it just be a case of changing the blog address url to myaddon.co.uk, changing $_SERVER[‘DOCUMENT_ROOT’] . ‘ to inaudible.co.uk, and just getting rid of the .htaccess file altogether?

thanks.