It's been a while since I did this, but if I remember correctly (no guarantees;-) he signs a form/letter and faxes it to the bank to release his claim, the title goes from the bank to you with their release of lien to you. You register car in your state with title
... though I registered mine in FL.
Call the bank... they deal with this all the time. They'll tell you how to do it.
Where abouts in FL is it?
Good luck