python dat_unpacker.py cpk_unpacked_folder your_extract_folder

if you do not have python3 then execute it with blender in command line
blender --background --python dat_unpacker.py cpk_unpacked_folder your_extract_folder

wmb files are packed in .cpk files under the game data folder which can be unpack by CriPakTools.
unpack the .cpk files and find .dat and .dtt files both of them are necessary for extracting models
unpack .dat and .dtt files using dat_unpacker.py
.wmb files can be found in unpacked .dtt files

.dat and .dtt file have the same name file name are paired
.dat file contains control information such material, motions of the model
.dtt file contains .wmb model and texture package

/pl -> main character models
/wd -> scence models
/wp -> weapon models
/um -> npc models
/em -> enemy models
/et -> item models

unpack all cpk files and merge them under the same forlder before unpack dat and dtt files

just a joke enjoy it.