Find and download the trial version of a program called Offline Explorer (might be Offline Explorer Pro). The program is designed to download whole websites at a time, but it also let's you download streaming files.
Now, I don't know if it will work with Quicktime, or with the sw.com servers.
What I do know, is that I've been able to download Real Player streaming files off the packers.com site, including a radio call of Super Bowl XXXI, which they played during the Packers bye-week this year.
(I need to grab the NFL footage from the game I was at in Dec. 2001.)
Anyways, once you have the software, get the URL for the Quicktime video you want, plug it into the software, and start it downloading. Again, I emphasize that I don't know if it will work, but it is worth a shot.