i made an change nick script:

This is for 6 auser for make you auser /auser [nick] 6
ON 6:TEXT:!nick *:#: { nick $2- }

This is for a nick:
ON *:TEXT:!nick *:#: { 
  if ($nick == [your nick]) {
    nick $2-
  } 
  else .notice $nick Access Denied
}

This is for all nick's:
ON *:TEXT:!nick *:#: { nick $2- }

Join in irc.rizon.net:6667 in chan #mIRC-Scripts for more help