Where to download Asp.net 3.5 Extension??

Question

Hi Friend!! I need to download asp.net 3.5 extension but i don't know where.Someone give me the link to download or upload that tool for me download easily.Thanks so much. I prefer this pages but i don't know where (a little silly )
First page is:http://www.asp.net/aspnet-in-net-35-sp1/videos/introduction-to-the-aspnet-mediaplayer-control and i see his toolbox have asp.net 3.5 extension.
Second page:http://www.asp.net/downloads/35-sp1#find but i don't know where.Hope helped!!