Add First and Last Name to Events+ Registration popup

I want to add the first and last name on my events+ registration form, and I used the gravity forms method you mentioned by Patrick on this ticked I have that all set up and working for registration on a separate registration page for general registration, but not sure how to get that form to replace the registration form that pops up when you go to register on each individual event. I can redirect them to the page with the new registration from when they click "register" on an event, but then I am worried it won't register them for that specific event at the same time. Could you expound a little bit on how to get the gravity forms method to work with the events+ plugin?