http://msmvps.com/blogs/installsite/archive/2009/05/15/sample-package-from-desktopengineer-com-helps-you-becoming-familiar-with-new-msi-4-and-msi-5-features.aspxDarwin Sanoy of DesktopEngineer.com has published a MSI sample package with a step-by-step self learning guide that leads you through testing new features in Windows Installer versions 4 and 5. Topics covered include: signed and unsigned UAC prompts,enCommunityServer 2008.5 SP2 (Build: 40407.4157)