Hi!!
Im was thinking in how to integrate a news latter to 4images, but when I installed a newsletter script I have a good Idea to do much easier, than copy the mail to another database, check
how If make a form that the users add therir mail for only recieve newsletter, that email keep it in the database, and when you go to your ACP Panel, in the section of send email, you can choose, mail for: gallery users and newsletter users to send the email
what do you think?!?!