Thank you for your response.
I did install "python-2.7.11.amd64" and "Pillow-3.2.0.win-amd64-py2.7" and restarted my pc ( I'm running a 64bit machine ), but still, after dragging the .WAV file into "3_wav2mca_mhx.bat" it just blinks for a moment then immediately closes the window without doing anything ( I also edited the bat file and put my filename so it would force the file to be converted but it converts into .DSP file instead of MCA.
I also tried this in a 32bit machine with the 32bit version of python with the pillow, and the same thing happens.
I also tried to take a very quick screenshot of the error. You can also see there that it forces me to have a .wav for the conversion to proceed, but i'm already using a .wav file extension.
Same error happens when i try to convert from MCA to WAV.
I'm stuck with this, please help. T_T