Glad it worked out for you. I'm only using the Workflow module because it's so very easy to setup access based on states and state transitions. Barring that, yes everything can be done with workflow-ng.

One question though, did you set the "Order has a product of a particular class" condition? That doesn't work for me. I eventually had to create custom PHP code to find out if the cart has items of a class.

Also, another thing I have to work out is when that item is removed from the cart it doesn't remove the parent node. I'm debating on whether or not it should.