Store entire form in cookie is a client side behavior, it is not listed under the Server Behaviors tab, it is under the Behaviors tab.
go to Wind -> Behaviors, not Server Behaviors.
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.