COnfiguring chat for private chat

This plugin makes me feel stupid:

Expectations: I am trying to replace Olark, which is a "helpdesk" like chat. This is something that a visitor would initiate. I don't want a group chat as this is not a bullitin board app.

I installed the chat plugin, followed the instruction on configuration. All I was able to accomplish is getting a public chat. That is not what I wanted so I disabled the bottom corner. Under Private Chat on the Chat Setting Site. There is only one option: Allow private chat popup to reopen after existing?

So I have 2 questions:

1) How do I get private chat to work?
2) How do I create a backend display for my chat agents

Thanks