Drupal help (Fivestar or Rate module)

Hi, Im looking for a drupal developer's help. I need to make a little customization to Drupal Fivestar or Rate module. I have added these modules as a CCK field, so users may vote when they click to node detail. But (and I need help for exactly this work) i want to set some restriction to this module. For example I have 10 nodes, where the users can vote, but I want to restrict that one user can vote for only 5 nodes for example, and after that in node detail i will set a message that this user has already voted 5 times. So the user cant vote for all my 10 nodes. I want to allow voting to anonymous users, it is working but I want to restrict to IP address. So anonymous users are allowed to vote from 1 IP address 5 times too, after that I will set drupal message that from this ip address you have voted 5 times. Can anyone help? Thank you