We'll create fresh WordPress site with User Management Tools installed. You have 20 minutes to test the plugin after that site we'll be deleted.
With the current WordPress administration area, the only way to add existing users to a certain blog is by entering their usernames, one by one. It’s very time consuming.
With this plugin, you can do it in bulk, by using the familiar “Change role to…” dropdown:
Note that you have to be a super-admin to be able to do this.