Something

on *:TEXT:`setgreet*:#:
set %greet $+ $nick $2-
notice $nick 14 $+ $nick $+ , Your greet has been set to:14 $2- $+ .
}

on *:TEXT:`unset*:#: {
unset %greet $+ $nick $2-
notice $nick 15 $+ $nick $+ , Your greet for $chan has been unset $2- $+ .
}

on *:JOIN:#: {
if (%greet [ $+ [ $nick ] ] != $null) { msg $chan [ $+ $nick $+ ]: %greet [ $+ [ $nick ] ] }
if (%greet [ $+ [ $nick ] ] == $null) { notice $nick Your Greet Is Not Set!14 To set a greet type: [7 `setgreet (greet message here) ]
} 
}