This simply adds a craftable "Viking Helmet" that resembles the Helm of Yngol. The Helm of Yngol is also worth more (It is a treasure item after all). As much as I love Skyrim, it bugged me I could only find 1 steel horned helmet with upright horns. The Helm of Yngol IS a cool treasure item, however it can't be tempered and when I got the Helm (For the first time) it's armor rating wasn't as good as what I was wearing. Anyways, I just thought it'd be cool to be able to craft a helm with upright horns and be able to improve it as well.