Insert Picture is a very simple script. If you open it in Manage | Scripts for editing you'll see that it's only Three steps long. You can easily recreate this script in any database file simply by selecting the same steps from the script editor. You can also import the script using the import script button in Manage | Scripts, but if you do, you'll need to update the Go To Field step to refer to the container field in your new file instead of Photo Catalog::Picture. This field will also have to be present on the current layout when you run your script by clicking the button.
Yep, this is exactly what I ended up doing. I appreciate your advice.