Microsoft Visual Studio Installer 1.1 is the latest update to the graphical tool that simplifies the creation of application setup programs for distribution to single user or enterprise-wide desktops. New with Visual Studio Installer 1.1 is side-by-side installation of versioned DLLs. Setups created with the Visual Studio Installer provide advanced capabilities such as centralized distribution for maintenance and updates, application self-repair, and powerful installation rollback facilities.
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setup1.exe
setup2.exe
http://msdn2.microsoft.com/en-us/vstudio/aa718352.aspx