Add this before the else {} statement in your !request event:
Code:
elseif (!$read($scriptdirsonglist.txt,nw,$remove($2-,?,*,&))) { msg $chan That song is not in my list $nick }
Then go into the script directory and create a file called songlist.txt with a list of songs. Each line in this file should contain just the name of the song - no other text.
