Tweaks: Content Ratings ...
Content Ratings is a fairly new package and is relatively Plone3 aware, unlike many of the packages it needs to work with. Here are a couple of things you can do to make it play nice with other components.
Ploneboard
Make the PloneConversation type "searchable" using the site_properties tab in the ZMI, this will allow the type to be visible to the "Content Ratings" control panel viewlet and hence will allow you to attach a ratings type to it.
PloneHelpCenter
The only issue here is that it uses Plone2 display templates, you just need to customise the display templates for the types you want to rate, using the stock document_view template as a guide.

