1. How do I disable the email automatically sent to the board admin when someone attempts to register?

2. When I decline a registration, is an email generated? If so, is the email send from the admin's personal email address?

1. If you don't have moderated registrations enabled you wont get any
2. If you don't leave a reason no e-mail is sent (the e-mail is sent from the board e-mail address your have set)

1. Theres the option under my stuff:
My Stuff -> My Preferances -> Notify me when a new user registers on the forum.

However if you have the option selected that users need to be approved by an admin before registration completes, i believe this is standard behavior.

2. All emails sent from the forum are sent by the board email address set in:
CP -> Master Settings -> Primary Settings -> Board Email Address

I believe that an email is only sent when declining when you enter a reason for a decline.

How do I configure that the board's e-mail or admin user, gets an e-mail on every new registration? I don't want to enable moderation. I just want to get an e-mail like classic did.

In 7.2 there will be an option in the admin's profile to specify if they want to get an email when someone registers.

How do I change the sender of the initial private message that is sent after registration - ie the Welcome Message ?

This is sent from the primary admin user.

Control Panel -> Primary Settings -> Advanced Options -> Main Administrator User Id

Thanks Rick

If I want to change the default user, where do I find the ID ?

Nevermind, found it thanks.