Try this.

Code:
on @*:join:#:{
  $+(.timerregcheck, $cid, $nick) 1 2 .notice $nick Please identify to your nick!
  whois $nick
  .timer 1 3 .disable #regcheck
  .enable #regcheck
}

#regcheck off
raw 307:*:{
  <commands to add registered users to your list, where $2 is the nickname>
  $+(.timerregcheck, $cid, $2) off
  .disable #regcheck
}
#regcheck end

New username: hixxy