WordPress MU

When a user wants to recover a lost password, the recover process is working but I want to change the email's header of the lost-password email.

To be clear here is the example of a lost password email recovery:
---------------------------------
from WordPress MU Forums <noreply@wordpress.org>
to xxxx@xxxx.com
date Wed, Apr 8, 2009 at 3:39 AM
subject WordPress MU Forums: Password
mailed-by wordpress.org
-------------------------------------

How do I change the <noreply@wordpress.org> to whatever I want? Like <mydomain@mydomain.org>...

I looked in wp-includes/pluggable.php, but since I'm not a coder, I got no idea how to.

Help?

Anyone has a solution to this? Please let me know. Thank You!

wp-includes/wpmu-functions.php

you don't need to be a coder to do a search/replace :)

Also, check for SMTP plugin on http://wpmudevorg.wordpress.com/