Mar 6th, 2012 under SQL Server PowerShell Gist

After walking through the installation GUI, copy the Configuration File Path on the ‘Ready To Install’ page. Copy and modify this file in the following order to generate a repeatable unattended install process:

1. Put a semicolon infront of UNIMODE=”Normal”
2. Set either QUITE=”False” or QUITESIMPLE=False” to true
3. Add the following line to accept the licensing terms: IACCEPTSQLSERVERLICENSETERMS="True"
4. Run the following as administrator from a command prompt: "path_to_setup\setup.exe" /CONFIGURATIONFILE="path_to_config_file\ConfigurationFile.ini" /SQLSVCPASSWORD="XXXXX" /AGTSVCPASSWORD="XXXXX" /SAPWD="XXXXX"