On second thoughts, use txt files instead of INI.

Code:
On *:Text:!Start:?: {
  if (!$isdir(Naruto RPG)) mkdir "Naruto RPG"
  if (!$isfile($+(Naruto RPG\,$nick,.stats,.txt))) {
    write $+("Naruto RPG\,$nick,.stats,.txt")
  }
  else { msg $nick You are already registered. }
}

on *:Text:!Chr *:?: {
  if (!$isfile($+(Naruto RPG\,$nick,.stats,.txt))) {
    var %do.cmd = write $+("Naruto RPG\,$nick,.stats,.txt")
    if ($2 == Sasuke) {
      %do.cmd Character: $2
      %do.cmd Level: 1
      %do.cmd Attack: 6
      %do.cmd Defence: 4
      %do.cmd Speed: 6
      msg $nick You have chosen $2 as your character.
      msg $nick To view Sasuke's attacks type !Attacks
    }
    if ($2 == Sakura) {
      %do.cmd Character: $2
      %do.cmd Level: 1
      %do.cmd Attack: 6
      %do.cmd Defence: 4
      %do.cmd Speed: 6
      msg $nick You have chosen $2 as your character.
      msg $nick To view Sakura'a attacks type !Attacks
    }
    else { msg $nick You already chose a character }
  }
  else { msg $nick You aren't registered. }
}


I've added both codes so all you got to do is replace.

-Andy