Configuration
Firstly you will need to install the extension onto your site which you will see in the first part of this series.
Next you will need to enter the serial key that would of been sent to you after the purchase has been processed.
Then you will need to enable UPS rates located under System>Configuration>Shipping Methods by entering your account details.
Ensure the UPS Type is set to United Parcel Service XML otherwise the calendar will not work.