you would nee to use a MySQL GUI Tool such as PHPMyAdmin or Sequel Pro to export the powerstore 4 users table and import it to the Power Messenger users table.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.