After spending a few hours with my SmartStor NS2300N while trying to guess why its download station plugin does not function like I want it to, I finally was able to find a solution.

Download plugin for NS2300N is simply MLDonkey P2P client. That is, you are able to connect to it and manage it using a bunch of GUIs, including Sancho which I could recommend as a best choice. GUI allows managing downloads and (more interesting!) managing MLDonkey configuration also.

My goal was to gain full access to the ways MLDonkey runs and manages files & torrents.