If you have the refined slate images applied to your DataAssist pages, the images will already be in your site. You can look in the WA_DataAssist/images/Slate directory and you should find the images you need for the buttons.
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.