To simplify it.
If your QA script (containing all q2a files) under wordpress site (blog.mysite.com/qa)
This means your qa script directory should be at the same location where wp-config.php file is.
than simply follow 1,2,3 and in 4th step
define('QA_WORDPRESS_INTEGRATE_PATH', '../');
Than 5th point 1 and 6th point 1