let admin to substitute the word instead "guest"

Hi

It will be nice let to admin use another word instead "guest", as it is
e.g. in user points module for word "points"

In chatroom settings can be input box where can admin write word which he want to use it. (visitor, anonymous... etc)

It will be probably very easy to change in module code, but this option will be more nice and useful for any admins.

thanks
Igor