NBZ format?

[Starchanchan]

I'm going to attempt to localize another short demo, but I'm not quite sure how to unpack/edit the .nbz files. Google didn't help much. Is there a program or way I can get these out so I can translate them? I seem to remember there being a thread on this a while ago, but I can't find it @_@;;

[HIGHWAY99]

Do you recall the company(s), rather .nbz is an archive file or graphic/music/video/voice/script? Usually it helps to do some searching by the company name as well. if it's a stand alone script file and not compressed in a package/archive, you might look it over in a hex editor a bit that can handle kanji.

[Starchanchan]

Well, it's a demo of a doujin visual novel (I own the actual game, but as it's commercial, I just plan on localizing the demo). It's a Kanon fangame by APPLEproject. I tried googling it with nbz in the search, but didn't find much. Still not sure how to extract them @_@