The icons should be available by default. There is a set of capabilities for showing them , that are applied to students by default. Check that the student role has the following capabities:
A similar set of capabilities is also used for the tinymce version of PoodLL Anywhere
The PoodLL repository is installed like the other plugins. But after installation you need to create "instances" of the PoodLL repository. 1 for each recorder type that you wish to use.
Do this at (from memory) site administration -> plugins -> repositories -> poodll