The current version is given as 0.9 which may mean that the work is not yet finished. However, work on the program seems to have been put on hold for at least a year. The author will not respond to non-Japanese enquiries. The applications in the HP CPack program will work, but what if you want to paste something from a Word document into NoteTaker. The downsides to the program are that there are no English instruction files.
Installation is a snap.
Just create a folder for the files in the .LZH archive and un-pack the three files into the folder. Look for an .NDB, .GDB or .PDB file on your Windows machine and open it. Now comes the challenge. The function key buttons on the bottom of the display will let you work with the program as if it were a Palmtop program. The top row menus are, indecipherable.