How to track affiliate referrals?

Here http://drupal.org/project/affiliates it says "If User Referral module is configured, users can track their affiliate referrals"
How to do that?

I want something like this: when visitor click on affiliate link, user get, let's assume 5 points.
If visitor register over that same affiliate link, user get, let's assume 20 points.

Is it possible to do that?
Thank you.