/S
Silent installation
Related to: IfSilent, SilentInstall, SilentUnInstall, SetSilent, Silent Installers/Uninstallers

/NCRC
Skip CRC check of the installer, ignored if CRCCheck force was set in the installer
Related to: CRCCheck

/D=C:\Application or /D=”C:\Program Files\Application”
Set installation folder ($INSTDIR)
Must be the last parameter on the command line and must not contain quotes even if the path contains blank spaces.

Note that command line options can be ignored or overridden by the author of an installer.