hide a 3rd party silent install

How can I continually hide a 3rd party installer I am silently installing? I have a NSIS banner that says...Quicktime is silently installing on your system

For some reason, the quicktime installer keeps coming to the foreground [in front of the banner] every time it changes screens.

Is there a way to keep hiding the quicktime installer window...keeping the banner window as the frontmost window?

many thanks
g

That depends on the installer QuickTime uses. If it was NSIS, you would use /S on the command line. The following websites have information about some of the most common installers and how to make them silent: