/A Administrative (puts setup in place for network installs) /G <i>filename</i> Generate installation log file /Q[0|1|T] Quiet mode - several UI options /QN[0|1|T] Quiet mode with reboot suppression /R Reinstall /U[A] Uninstall [A removes all shared components as well] /X <i>filename</i> Set network log location to track install instances /Y Install without copying filesThe Office 97 reference goes into a bit more detail. Most of what I've learned about it came from experimentation and hacking the install files before I switched to wrapping a Setup Wizard runtime install with InstallShield, letting InstallShield manage everything but the runtime file install (I launch it inside an InstallShield script with /QNT to suppress user input and the Setup Wizard display screen.)