There are two types of Standalone Updates: Individual (or Delta) and Combo.
These distributions are available as a 321.5MB download for Intel Macs running Mac OS X 10.4.4 or later and a 180.8MB download for Power PC Macs running Mac OS X 10.4 or later.
Apple warns that users of the update may experience unexpected results if they have third-party system software modifications installed, or if they've modified the operating system through other means.
Standalone Updates let you update to a newer version of Mac OS X from your hard drive instead of using Software Update, which requires an Internet connection.
Download the one(s) you need and install them after mounting the disk image and launching the Installer program.
The update is available as a 128MB download for Intel Macs and a 67.9MB download for Power PC Macs which are running Mac OS X 10.4.10.