I need to install a web deployment fromn a quiet installation and pass in the web directory, installation directory etc. I know that the values of the MSI are available to a custom action, but my experience is that in quiet mode these get overwritten by the default value on the GUI even when in quiet mode.
Am I wrong on this assumption (or indeed is there a setting I've missed to stop this behaviour?), or is there another way to support the installation using quiet and passing in parameters.