[Zope] First time using ZDiscussion

Hi I have downloaded and installed ZDiscussion. Can anyone direct me to some instruction on how it is used? I have checked the read meees of all the products, but they don't give a usage overview. I have also searched www.zope.org for ZDiscussion and only found the download link. I think that product is a set of classes which expect a user interface to be developed by me. Is that right? Thanks in advance Neil