Custom code for Wordpress - to reward buddypress users for receiving messages

Am looking for a solution that will award points to users for RECEIVING buddypress private messages. I already have mycred plugin which has an option that awards points for SENDING messages. I have a attached a file with the hook that awards points for various actions. Take a look and find out if you can add the option to reward people for receiving messages. For purposes of NOT wasting time - Your brief should talk about this project and the attached file only (no links to the sites you have created before). Also you don't need my ftp details to do this. You just need to test the plugins on your local wordpress installation and create the necessary code.