You should be able to export and import from phpmyadmin without issues. You can choose to drop the tables if they exist in the export script so that they will be completely overwritten.
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.