In Magento_Community_1-7_User_Guide.pdf shipping starts on page 145 (page 155 in PDF). But they do not explain the DHL module.
Where do I find documentation about how and what to configure this?
Also I wounder if this custom shipping calculation is really needed for a simple store or if fix prices do work fine in real life.
I found a DHL Intership extension that claimes to be the official tool. Is this an addition to the mangeto core function? Does do the same and is not needed anymore?