Suggestion: include a QuickLook plug-in for the Finder. There are a couple of options out there that do this for a few file types (zip, pkg, etc.), but most are old and not often updated. I would be very interested in spending $4 to get a version of your app that does that. QuickLooking into pkg & mpkg would require some way to display the scripts that run, where the files would be installed, etc., but you get the idea.