>I checked out Q105223 of InstallShield's KB.
>
>Whilst it does do upgrades of existing installed programs/elements, it does not provide for added new items such as a new report format. Nor does it apply to items the user previously did not install.

You could write a VFP program to fill the gap (by now the main application and support files are already installed in the target machine so it wouldn't be too hard to code and could be a very simple, almost interfaceless companion application). You could also integrate this facility in your application from start.