Something

on *:TEXT:!setpcworld*:#: { 
  if (($nick isreg $chan || $nick isvoice $chan )) { halt } 
  else set %pcworld $2- 
  msg $chan The PC world has been set to: %pcworld. 
} 

on *:TEXT:!pcworld*:#: { 
notice $nick The current PC world is : %pcworld 
}