You will have to go through a credit check as part of an application process to request the feature, as well as agree to a monthly service charge. There is no free trial offered.
That question is already answered in the 2 other places you already asked it: http://www.zen-cart.com/forum/showthread.php?t=141901
The above discussion is related to errors resulting from checkout in specific currency, and is not related to your shipping question.
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