Any method for automated/unattended installation?

Hi there folks!

I'm a maintainer for a repository of mac software where we try to provide a consistent interface for package management on OSX.

We support most zip/dmg based applications, and we're currently in the process of implementing support for software that needs an installer/uninstaller to be run.

It looks to me like there's no way to run your installer or uninstaller without clicking through the GUI windows - is that the case? Or perhaps there are some undocumented switches that can be used for an automated install?

Thanks in advance for your time!

Paul