Make sure to unset those variables, so that someone wont get voiced twice if you happened to do a version yourself.
Code:
on *:CTCPREPLY:VERSION*: {
  if (mIRC v6.16 Khaled Mardam-Bey isin $1-) {
    mode %chan +v %nick
    unset %nick | unset %chan
  }
}

-- HAMM3R (aka: alhammer)
http://www.HAMM3R.net