I have an app that was not installed by Zen. It was run from an exe file. I now want to uninstall it silently. I have created a standard app and put rundll32 in the application file path and C:\PROGRA~1\COMMON~1\INSTAL~1\engine\6\INTEL3~1\Ct or.dll,LaunchSetup "C:\Program Files\InstallShield Installation Information\{790539B0-E58E-44AA-B0AB-6E648ABCB930}\Setup.exe" -l0x9 -uninst in the parameters section (which is the uninstall string from the registry). It works fine apart from I want it to run silently. I have tried adding -s and -removeonly at the end but still I get the "Do you want to remove this program" box.