No, UE 3 does not work in DWCS5.
you will need to use DW CS3, or DW 8 with UE 3
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.