those other extensions will be found in the Insert -> Web Assist menu
if you are not seeing them, go to Commands -> Manage Extensions and make sure the extensions are listed as installed there, you may also need to restart Dreamweaver.
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.