I'm interested in this too, though I want ten posts before they are in the "registered users" group. Now, I'm sitting in the admincp > Usergroup > promotions area, and while I see how to set up a promotion from one user group to another, I do not understand how I am to instruct the board to put new users, upon registering, in any other group but the "registered users" group.
Okay, I created a new usergroup called "New Registered Users," that has the attachments "off." Then, I set up a promotions that would promote people from that user group to the "registered users" group after 5 posts. However, when I looked at the Usergroup manager, none were in it, and I know there are users that have less than 5 posts. However, I created a new account and logged in under that account. I was still able to post a picture. The account did not go in the "New Registered Users" group.
How do I accomplish that??