Where can i download the fall dashboard update for xbox?

On November 1st i recently found that theres a dashboard update for xbox. My problem is that i connect my xbox to xbox live through dial up (A instructable show me how to do it). Now i cant get on xbox live unless i download the update. The update download takes a large amount of time. I want to download it to my laptop from a wifi hotspot, put it on flash drive, and install that way. I did it before with the 2007 update but i cant find the nov. 1, 2010 one online. Can anyone show me a link or direct on how to get it.