http://www.subsim.com/radioroom/downloads.php?do=file&id=4222
It looks JSGME-ready. So just extract it into the MODS folder inside the Silenthunter 3 installation folder. And enable it. (Assuming you already have JSGME, if not: http://www.subsim.com/radioroom/downloads.php?do=file&id=3951)
I don't know if there are any mod-dependencies involved. So just try.
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