>Doesn't Visual Studio Installer use the Windows Installer technology? If so, then everything is compatible because InstallShield uses the same technology. It just supplies a nifty interface to it.

Thanks, Larry. That's what I was trying to find out. Yes... according to the documentation, Visual Studio Installer 1.1 is based on Windows Installer technologies. So if the version of InstallShield that we get with VFP7 is also based on Windows Installer, then presumably the same merge module will work with both installers.