2. Note that your soundtracks, songs, etc. must be in the MP3 format with bit rate at or below 320kbps.
3. You can use Audacity to reduce the bit rate of your files or convert them to the MP3 format.
4. Let's say that file you copied is "mymusic.mp3".
5. Locate "playlist.txt" in your "czero" directory and open it.
6. Locate this line in the text file :-
"Splash" "sound\music\downed_intro.mp3"
Change it to :-
"Splash" "sound\music\mymusic.mp3"
7. Run CS:CZ and enjoy the new intro music!