Sub category templates

I found the answer – this was in the function.php file – I just needed to update the category ID (long story):

function inherit_template()
{
    if (is_category())
    {
        $catid = get_query_var('cat');
        $cat = &get_category($catid);
        $parent = $cat->category_parent;
        $cat = &get_category($parent);
        if ($cat->cat_ID == 215)
        {
            if (file_exists(TEMPLATEPATH . '/category-limousin-magazine-templates.php'))
            {
                include (TEMPLATEPATH . '/category-limousin-magazine-templates.php');
                exit;
            }
        }
    }
}

add_action('template_redirect', 'inherit_template', 1);