I haven't had a chance to do a remote install yet, but I may have found the answer to my own question. I'm thinking that I just need to click the "Add connection" button and add a connection using the IP address and then I'll have a connection on which I can perform a remote install. This might be just a semantic issue, as to me, a "connection" is something you don't have until RU is installed on the host, but it looks like you have to create a placeholder for the connection you are going to set up until you actually deploy RU. If there is a better way or a way to scan the LAN for IPs built into the Viewer, please let me know.