I just got my SSL certificate working via my webhost. I have a main site:
www.authenticnz.com
and my secure site store.authenticnz.com.
In my includes/configure.php file, I set
define('HTTP_SERVER', 'http://www.authenticnz.com');
define('HTTPS_SERVER', 'https://store.authenticnz.com');

and in admin\includes\configure.php I set
define('HTTP_SERVER', 'http://www.authenticnz.com');
define('HTTPS_SERVER', 'https://store.authenticnz.com');
define('HTTP_CATALOG_SERVER', 'http://www.authenticnz.com');
define('HTTPS_CATALOG_SERVER', 'https://store.authenticnz.com');

and set the SSL flag to true.

what happens now is when I click on any secure links like login or go to checkout, I get 'page not found' which makes me think I have a setting wrong. How are those links built? Any help would be appreciated.