Im an ambulance driver and

Question

im an ambulance driver and my wife and i do charity shows at nurseing homes and old peoples homes i use cdg discs with on screen words for backing my prob is that i can copy a complete disc with the on screen words with start smart as long as i tick the "read sub channel" box but i want to edit the disc so i can pick various tracks from each disc and burn them on to one this will save me having to keep changeing discs and enable me to get more songs performed in the time given in laymans terms can you help me ps i can only copy the complete disc on start smart with sub channel ticked