Yeah, it pretty much is not-quite-so-legal to modify your console system. I wouldn't call it illegal since it's not like anything can be done unless someone's getting paid for the modification at least.
Skyrim Forum
Omega Dragon
Omega Dragon
By the way, where'd you get the name Naginata from?
Naginata
It's the name of a Samurai weapon. The Naginata is basically a long rod with a curved blade at the tip that is something like two feet long. It's a pretty wicked spear :D Here's more info, actually.
http://en.wikipedia.org/wiki/Naginata
http://en.wikipedia.org/wiki/Naginata