Kozaburo's hair comes with the correct folder structure in the ZIP file, except for his oldest hair models (those for the P4 woman). It's usually easiest to extract the ZIP file to the Poser 7 main folder, the hair will end up in the correct library, and the textures will also end up in the correct location.

Things can become tricky when you place the files manually. The library files are pretty easy: .cr2 goes to a subfolder of runtimelibrariescharacter, along with the .rsr or .png file with the same name.
.hr2 goes to a subfolder of runtimelibrarieshair.

The .OBJ files should go to a subfolder of ..runtimegeometries, but which subfolder, that can be tricky. Here you should follow the directions in the .txt files.
Same goes for the .JPG files, usually they should go in a subfolder of ..runtimetextures. Again, what subfolder should be mentioned in the .txt files.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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