1. A5 Shipment object is included with the app to create a Shipment record for each shipment.  You can relate this object to any other object you want in Salesforce by creating a Lookup type field on the Shipment object.
  2. Then add the Shipments related list to the your object page layout.
    1. You will want to setup a custom button to pass the Related To value and lookup field name when creating a new shipment.  See this section of the documentation.
  3. Included in the app is the App called A5 Ship that has the tabs: A5 Ship Configuration, Shipments, and New Shipment.
    1. You may want to add New Shipment and Shipments tab to another app you use regularly for easy access.