1) You don't have to buy a serial everytime you make a site with cms builder... the same serial number will work on unlimited sites.
2) You can add cms to a template created in another editor from 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.