Windows Installer 3.0 Redistributable
http://www.microsoft.com/downloads/details.aspx?FamilyId=5FBC5470-B259-4733-A914-A956122E08E8&displaylang=en

Quick Info
Download Size: 2 KB - 2025 KB
Date Published: 11/8/2004
Version: 3.0.3790.2538


What's New in Windows Installer Version 3.0
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/what_s_new_in_windows_installer_version_3_0.asp

The Standard Installer Command-Line Options are available beginning with Windows Installer 3.0
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msi/setup/standard_installer_command_line_options.asp

Windows Installer 3.0 is available
http://support.microsoft.com/?kbid=884016