So, let's see;
From the Russian readme:
"Copy all files from this archive into the game directory (the archive contains paktool.exe an some .dat files, eg 2D7891F9.dat - just regular PNGs and such with a .dat extension).
Launch paktool.exe like this:
paktool.exe /p data.pak *****
where ****** - path to game folder, like
paktool.exe /p data.pak c
games\bsword3\
The data.pak will be modified as a result."
Also, try moving data.pak, replacing it with the extracted files. Some games do look for extracted files first before trying to unpack the archive.
Without having the archive itself I'm afraid I can't help you.
