adding a feature to one website i got jedran.com

My client has not confirmed this point he clearly asked for having a Guest book in this section linked to wordpress that any one can start a new topic and any one can comment in this topic then last topic updated will be at the first in the top with the owner or any one commeted in same topic will recive an email that hes topic has been updated also there is no need here to approve the comment by website admin: here is an example Guest 1 wrote title and body title3 last updated today 3am by admin title1 last updated today 5am by guest 5 title4 last updated yesterday 9pm by guest 3