Mine

on *:TEXT:!setgreet*:#:{ if ($2 == $null) {
  notice $nick Please insert a greet message
halt
 }
  else { set %greet. [ $+ [ $address($nick,2) ] ] $2-
  notice $nick Greet Updated: %greet. [ $+ [ $address($nick,2) ] ] }
}
on *:JOIN:#:{ $iif(%greet. [ $+ [ $address($nick,2) ] ],msg $chan %greet. [ $+ [ $nick ] ]) }