Code:
alias copy_coins { 
  echo -a Moving coins initialized
  var %file1 $qt(old coins.ini)
  var %file2 $qt(new coins.ini)
  var %sec #tylersgaming
  var %items $ini(%file1,%sec,0)
  while (%items) {
    var %item $ini(%file1,%sec,%items)
    var %value1 $readini(%file1,%sec,%item)
    var %value2 $readini(%file2,%sec,%item) 
    if (%value2) writeini %file2 %sec %item $calc(%value1 + %value2)
    else writeini %file2 %sec %item %value1
    dec %items
  }
  echo -a Moving coins finished
}
Type /copy_coins
If this freezes your mIRC application, let me know and I'll attempt doing it through an hashtable (never done this before)
By freezing I mean if you don't see the "Moving coins finished" echo and your mIRC stops responding. Give it some time though, you might have it done in 20 seconds if you just don't touch mIRC.