What an awesome tool! Compliments!
I have two questions:

1. Why does the new user registration after verification end up in the admin part? I would like the new users to only see the front end (gallery, albums) after I approved it. After they newly register, they end up in the back end. They don't really get a message that it's pending approval. Can I easily change this? Maybe a code change?
2. When a new user registers I would like an email. I have checked the box for admins to receive an email when a new user registers but the email is delayed by a very long time. (I use the zenphoto_sendmail). The other emails notifications are directly send.
   Many thanks for your help!

1. Because to Zenphoto all users are the same generally. The are also able to generally edit their account.
   I admit I basically never use user registration myself so I cannot answer right now.

2. I cannot answer this. It may be the actual provider who sends the mail and may delay it for whatever reason.