In the upper-right hand of the website will be a box to enter a code.
Enter M95MN
Fill in all the information with information the only thing that matter's is the email.
Check "no" where it ask if your a Xbox live member.
Go to email and you should have a email with you code in it.
Edit: To get codes faster, hit the back button after you hit submit. Change the email and hit submit again. Temporary email not working now, many is banned. Working only populary e-mail.
