Konnichiwa,

Yes this is the correct folder. Use RSW Bifeditor to view the content of Biffiles. The naginata is unit4, lunit4 also shows the nag (I don't recall this exactely anymore, but 1 might be used in the mongol era, while the other is for sengoku).

By backing up files, and renaming you'll find out in no time.

Good luck.

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Ja mata
Toda MizuTosaInu
Daimyo Takiyama Shi

http://www.takiyama.cjb.net