[Lynne]

First, you'd have to add that option for the forum - probably look at the template code and add it there (right now, there is a condition around it that stops it from showing up when subscribing to a forum - $show[subscriptions] or something like that, I can't remember off the top of my head).

Then, you will have to look into the thread code that sends an email automatically when a user is subscribed to the thread. You'll have to add to that code to check if a user is subscribed to the forum to get instant emails and send them then.