[HAL9000]

This is a free update, just like the previous six updates from Apple.

[bwteim]

FYI

If you want to load it manually, you can see one of these two links, depending upon what your current OS is

Updating from Mac OS X 10.4.6 to 10.4.7
http://docs.info.apple.com/article.html?artnum=303771

And
The combo update installer (described in this article) updates Mac OS X 10.4, 10.4.1, 10.4.2, 10.4.3, 10.4.4, 10.4.5, and 10.4.6 to 10.4.7.

http://docs.info.apple.com/article.html?artnum=303772