I understand it and have installed it.
Works perfectly >>
http://www.rock-forums.com/community/register.php
If people don't understand this hack, it's simply deleting the EMAIL CONFIRMATION BOX. This means that the user only has to type in the email address once. If you have your forums set so that users are required to confirm their email address, this will not change anything to do with those settings.
I presume the confusion is coming with the word "confirmation".