If you are wondering what is a good live chat program you should check out http://www.Zopim.com. They offer a pretty fair free program and also a paid version if you need the extra functionality.
To add the live chat to your website get the code that's provided to you by the chat provider and follow these steps:
1. Log into your CRM.
2. Hover over websites & click on the website you wish to add the live chat to.
3. On the left menu click on the "Global Content" menu.
4. Look for the "Before Head Code" section & click on "Edit"
5. When the editor opens up click on the "Source" button to view the source of that page and paste your code int hat page. Please note that if you already have some code there you should put your chat code at the bottom.