Personas - Changing functionality of save button

Hi Experts ,

I am totally new to personas and have been handed over a requirement wherein I need to change the functionality of the save button in transaction QA32.

The requirement is that on pressing the save button, it should display a pop up where on clicking yes --> it should open a new tcode which has the data present on this screen.
Is it feasible / advisable to change the script of the SAVE ? Or should I just suggest using of a custom button ?

Thanks,
Unnati