Run scripts in scripts?

Ok, so the title isn't exactly good at explaining what I want to do, but basically I'm trying to put create a model that has a script in it, and then run the script that's in the model. It doesn't seem to be doing it automatically.

For example: Say I had a button that you could push to spawn another button. The other button would be pushable as well, but since the script for the second button isn't run when the second button is placed by the first button, you can't interact with the second button.