InstallAware

Is it possible to execute install in a reduce mode, like we can do with msiexec (/qr parameter) ? This mode only shows progress bar.

Sure. If you want a silent setup, use "/s". If you want to show a progress bar, then you can define your own command line switch - use Parse String to look into the command line string CMDLINE in your script, and then if you detect that user wants a progress bar but nothing else, you can skip showing all other dialogs except the progress bar dialog.