I believe we have addressed this concern in your ticket but correct me if I'm wrong. With that being said your new 6.0 screens should all look like this for shipping.
UPS, Fedex, USPS, etc all got a bump up in terms of UI and you no longer have to configure them in the Advance settings section. All "Custom" aka non USPS, Fedex, UPS, are now listed as "Offline". These are the old method of shipping providers through this screen such as shipping by weight, etc.
I apologize for the misunderstanding. I fully understand your problem now. The problem we are having is that in the latest version these all appear to be hard coded. We are currently working on finding a work around that would let you add these international options. When we devise a solution we will post it to this thread. I believe we have an up to date copy of your project in hand we are testing with but if you wish to add any additional private information I would appreciate it if you would open a support ticket.
Thank you for your patience.