Only Power Gallery licenses that where purchased prior to April of 2010 are eligible for unlimited domains, after April 2010, the licensing terms where changed to allow for installing on 1 live domain and 1 testing domain.
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.