Correction: one of the images says "the only server Paragon Chat allows you to use is the Titan Network server". This is incorrect. Any XMPP server with MUC (Multi User Chatroom) support will work fine. XMPP servers
without MUC support will show you al your contacts in the friends list, and you can send tells back and forth, but you cannot see each other.
An example of the former? Most servers in this list:
https://list.jabber.at/An example of the latter? Google. You
can use your Google account to log into Paragon Chat, and you will see all your Google contacts as global friends, and any tells you sent them will show up in their Hangouts client.
I can put together a tutorial on setting up your own, but we don't want to fragment the community when it's barely getting back together.