Use drop-down selection for the ot-module's selection

[lat9]

Using radio-buttons instead of a checkbox-type selection will allow the module to be used with One Page Checkout and also correct the issue where the customer's setting is "lost" after navigation back to the checkout_payment page under the 3-page checkout processing.

See this Zen Cart posting for additional information.

[lat9]

Modification to the above, since the radio-button formatting can be drastically different from one template to another. The selection-type has been updated to use a drop-down instead of a checkbox.