One of our client is still using Sugar 5.5. In this version, contact popup has create contact button. It displays 4 four fields from ContactFormBase.php file. Client wants the form same as quick create form. In Sugar professional, This requirement is already in place. I have been trying to find the way how to change the button behaviour so that create button shows quick create form. However, it seems not easy in Sugar Professional.
Can someone help me how can this be possible? What files to look at and should modify.