I was wondering the same thing, but not sure I understood the answer.
If extension is installed, will it hurt affect existing pages?
Does server need to have PH6 installed first before we can install and learn how to use it?
I have a dedicated server with all domains. Is PH6 activated per domain or is it server wide?
In other words, I'd like to start learning how to use it before it is critical to know. Thanks!