on *:JOIN:#: {
  if ($nick == [Rise_Against]) {
    msg $chan Type !Commands to see my commands. PM Paco_a_Paco, join #Paco_a_Paco, or join #Rise if you have any questions or if you are having any problems.!Part if you would like my bot to leave your channel.
  }
  else { halt }
}



Just change the nick part to your bots name, and next to msg $chan write what you want to say there