Well first of all you need the PoodLL filter for any of the PoodLL plugins to work.
Then you need to decide where you will use the whiteboard.
If you want it use it in quizzes you need the PoodLL Recording question.
If you want it on the html editor you need PoodLL Anywhere (for TinyMCE or Atto) .
If you want it in assignments you want the PoodLL Assignment Submission plugin.
You get the other stuff (mp3 recorder etc) as part of the PoodLL filter, if you don't need them you can hide them. You can configure PoodLL Anywhere and the PoodLL Assignment Submission at the site level, to only show the whiteboard. The attached screenshots show that.
I hope that helps