Not sure what trouble you are having but I installed this and I couldn't for the life of me work out the problem with my attributes controller then I did a quick winmerge of the admin/attributes_controller.php and realized that this mod needed an updated version to work with 1.3.9h
It was missing
Code:
<?php echo zen_draw_hidden_field('securityToken', $_SESSION['securityToken']); ?>
From a number of sections
I hope this helps - this made it work on my store (cross the fingers there is no other issues)
I have attached my version if anyone can use it!