register but don't know how to?

hey..i have just download the new unity 3.1 version but i'm not sure how to register, do you guys have any ideas?

thank you

http://answers.unity3d.com/questions/19511/how-do-i-send-a-request-for-a-key

http://answers.unity3d.com/questions/16244/licence-request-file

http://answers.unity3d.com/questions/14967/i-cant-register-the-free-unity-version

http://answers.unity3d.com/questions/11701/internet-activation-issues.

http://answers.unity3d.com/questions/5608/unity-registration

Please check for posts already made, you'd be surprised that a lot of your questions are already answered more than 5 ways...

But hope those help =)