Getting Custom Fields to Display in Back End Listing

Hi,

The type "custom text" is there for you to be able to add custom text on the form where the custom fields are being displayed.
A custom text custom field won't display anything on a listing.

To do what you want, you need to do two things:
- create a custom field of the table "order" and of the type "text".
- create a mass action with a trigger "after an order is created", and a trigger "after an order is updated", a filter on the order_shipping_id column with the value being equal to the id of the shipping method you're targetting, and an action "update the values" on the column of your custom field and the value being the text you want to be displayed on the listing for the orders made with that shipping method.
Note that it will only apply to new orders or orders you'll modify after setting up the mass action. Also, at least 1 order has to have the custom field filled for the column to be displayed on the listing.