To use:

Please backup your "c" folder before installing.  Place the contents of the Unskirt Mod folder into your Kuro no Kiseki 2 folder.  It should ask you to overwrite 63 files if you are copying to the correct place.

To use the bonus Shizuna bikini costume:

Identical to above.  It should ask you to overwrite 1 file, chr5117.mdl.  Please note it will overwrite the Shizuna mod from Unskirt mod.  To switch back, copy the chr5117.mdl file from Unskirt mod.

Enjoy!  -amorrow28
(This should have been a free download from loverslab.com)