some pro. help on nokia ringtone conversion

heylo all plz could any one tell me the way , process of changing the chords on midi files for 6610/6100/7210 phones? i have been trying to do this and every time it just happens fluke . what does the cumilative (cum) means?? and then wat does polyphonic user means? how am i suppose to convert a 40 cord ringtone to a 4 chord?? when i change the polyphonic user to say 1/2/3/4 , i notice it bcomes green . y is this ? and yet somtimes it just doesnt go tru , and somtimes it does could you please tell me wat is the real process of doing this? thanx __________________ go to this site, there are some documents that can help you. It's from nokia developers site http://www.forum.nokia.com/main/0,6566,060,00.html just look in the list, it's about media and music - Using the Nokia Sound Converter (doc) - Nokia Audio Suite 1.0.2 (progr) - MIDI and True Tones in Nokia Phones v1.2 (doc) Mavi forum