Hi --
Genos itself cannot sample. You need a DAW or other audio editor to extract the audio from the music CD. WAV format should be 16-bit, 44100Hz.
The next step is to create a Genos custom voice using the Yamaha Expansion Manager (YEM). You'll need to import the WAV files that you created in the first step. Then, edit the voice (filter, amplitude, whatever). Please see the YEM Owner's Manual, which is included with the YEM download.
Once you have created the new custom voice, you'll need to generate a pack install file (ppi) for Genos and install the pack file on Genos.
Hope this gives you the big picture -- pj