Seems like the guy has done modifications in his site and you will have to get registered. Any way I think his notes were really good.
Thanks for using my notes. I am happy to hear that it helped you in your preparations. The site has undergone some changes as I'm playing around with some Wiki options to make it easier for me to add more content.
However, I want to stress that you DO NOT need any registration to get the notes. The links from other websites might be broken, but you can access the contents here.