I added a new script to my software page. Inno Setup CLI Help is a set of functions in Pascal that can be included in any Inno Setup installer to display command line usage information to the user when /? is passed to the installer. This help information includes both common parameters available for all Inno Setup installers, as well as the components and tasks that are unique to each installer. The purpose here is to educate the user and make it as easy as possible for him to automate and/or customize installation to suit his needs.
Full details, a screenshot, and download links are available on the Inno Setup CLI Help page.