Nope it does not use /S its a INF addon, as for installing it manually yes you can but you may want to edit the INF to remove the prompts if you want to make it silent Extract wbsys.dll, wbload.dll, WB602enh.inf and WB602enh.cab to the WPI "Install" dir and use this command to install it rundll32 advpack.dll,LaunchINFSection "%wpipath%\Install\WB602enh.inf",Install To remove the "Do you want to install WindowBlinds 6.02 on your computer?" prompt edit these 2 lines in the INF.