Excuse my basic question but do I have to edit the two built-in script that are now in Hook and substitute then with these scripts? Or is there some other way to add these scripts without deleting the built ones?
You would be overriding rather than deleting the scripts. You can always revert to the built-in script included by CogSci Apps in Hook. To delete the override, just press “-” in the bottom left of Hook’s Scripts Tab.