Examine the following answer file component using Windows SIM:
Microsoft-Windows-Setup\UserData
You’ll see three settings there. The first setting (AcceptEula) must be configured as True if you want to automate the windowsPE configuration pass of Windows Setup. The other two settings however (FullName and Organization) are optional, and you can use these settings to specify your name and organization. This information will be displayed on the View Computer Details page of the Welcome Center when you first log on.
For more information on deploying Vista, see my series of articles titled Deploying Vista right here on WindowsNetworking.com.