There are many free shoutboxes you can add to your site. What shoutbox are you wanting to add. You can also add a free chat to you site also if you do not have one, it has private chat also. You can go here and make your own chat , with your own rooms and embed it , it will give you the codes. http://chatovod.com
. I have one set up just for testing , you can go in as a guest also, if you want to see it, just go here. http://the-peepz.chatovod.com/
, get a friend to go with you with another computer and test it.