MSI Command Line Options

http://support.microsoft.com/kb/227091

There was a lot of other pages, but this matches what I was seeing in the private installer.

Window Installer (MSI)

http://en.wikipedia.org/wiki/.msi

An engine for the installation, maintenance, and removal of software on Microsoft Windows systems.

Finger Prints and other Biometrics in Windows 7

http://gcn.com/articles/2009/10/16/getting-your-fingerprints-on-windows-7.aspx?s=gcndaily_221009

Biometrics is now part of Windows 7.  Any device that conforms to the Windows Biometric Framework (WBF) should work.