If you are beginning to test Vista, and are looking into the various activation methods, you will quickly learn that KMS activation requires a minimum of 25 PCs.
Previously I had been using netdom.exe from the Server 2003 Support Tools to join computers to a domain automatically. However, using VBScript and WMI is slightly easier because it doesn't require any extra files.
If you have created a Vista image using a Scripted OS Install task, then you most likely left the command line to install the DAgent: C:\DAgent\DAgent.msi /quiet server_tcp_addr=%DSSERVER% server_tcp_port=402 scripted_install=1 LAUNCHUI=FALSE<
When adding a Create Disk Image task for a Vista image and modifying the advanced sysprep properties, selecting "install additional drivers" and adding a path will allow drivers to be injected into the image.