In the Standalone usage you can create custom shipments using the OpenERP interface. To access this functionality open Warehouse >> UPS Shipping Register.
This figure shows how a new package is created.
After entering the required information, you can click request and the program will communicate with the UPS server and fetch the billed weight, and amount for shipping as shown below.
Output from which label could be downloaded.
The label will open in your preferred image viewer.