http://www.dreamcarchallenge.com/main/Default.aspx -click enter challenge, then click next step until you get to the form. Fill out the form, and make sure you check the box that says “Yes, I would like to receive Microsoft Points by participating in this promotion. Tell me more about Microsoft Points”, then submit and they will email you the code. You can redeem the code here: http://points.microsoft.com –ADDED-they are still sending the email, but it no longer contains a code. I’ll update the post if it starts to work again