I assume you actually are using Site Sculptor? It will only work with MySQL, there is no way to get it to work with MSSQL outside or redoing all the database code.
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.