Just go to the site in the story. When you go there click on OK without entering anything. This will bring up a link to begin the registration. If your country is not listed in the drop down menu you will not be able to register (unless you don't mind your home country being wrong ).

From there it's very straightforward- just fill in the information as they ask for it. Then, when you do finally get the PS3 you will have your log-in e-mail and password ready to go.