I'm using WSUS-offline for reviving a batch of identical machines for a school PC pool. They're getting a new XP installation using sysprep ... which is why I'm using PING.
I hate waiting for automatic updates to decide it's time for something new. It's especially irksome when you're installing XP-SP2. The WSUS-offline is a big help!
For those who haven't had a look: you can tell the program to download all updates from Win XP onwards, including servers and also for Office. Just start the whole shebang, then go for a long coffee break.
When applying the updates, you can tell the program to automatically handle the rebooting for you, so go have another coffee break