Does this addon work well with third party themes?
We provide the addon compatible with any one of the third party themes you desire for free. But if you need it compatible with more than one third party theme then it will be a part of customization.
Does the extension code encoded/encrypted or can we customize it?
The code is fully open & you can customize it according to your need.
Is it possible to assign Custom Shipment Carrier to Shipping method?
The carriers being added are independent of shipping methods. You can not assign the carriers to shipping methods.
Can an admin send mail automatically to customer with the tracking URL?
Yes, A mailing system is provided which consists of details of carrier and tracking URL of shipment. Customers acn track their order directly from the shipment email..