Which file is that for? I would like to edit it for my forum...
On a side note, why isn't this an option in the user prefs like it is in vBulletin, or phpBB? I can't stand not being notified of every reply... it's one of the very first things I enable when I create a new account anywhere.
In this day in age, few of us have the kind of time to check a forum every day habitually... I am sure I am not the only who would just assume get an email...