all of the info in the "Defining a Dynamic Site in Dreamweaver" tutorial still applies in DWCS5, Adobe has just rearranged the site Definition panel a little bit.
To Complete Step 9 of the Local Info section of the tutorial, Go to the Site section of the DW Site Definition wizard to set the Site Name and Local Root Folder.
Then go to the Advanced -> Local Info section to set the HTTP address.
To set the Testing Server, go to the Servers section, click the plus button and set the Access, Testing server folder and URL Prefix following as outlined in the tutorial, to set the Server Modal, click the advanced button.
After you click OK to create the server settings, click the checkbox under testing server
repeat those steps using the tutorial guide for the remote server. After these server settings are saved, click the checkbox under Remote.