The demo should cover all the features in PowerStore, but i do understand that you want to try it yourself before committing to buying. Currently that is something that could not be added to PS 4, but it could be definably added in the future.
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.