I'm not too sure how it works in Florida, but when you take the NERBs, it will have to be in a state where they offer the NERB. You'll either have to find patients in that state or bring them up from your patients in Florida. I don't know what the specifics of the Florida exam is, one senior who is taking it said she had to do endo on an extracted two rooted premolar, which you don't have to do on the NERB. The NERB makes you do endo on a plastic central incisor. The seniors who are taking the NERB at my school (pretty much all of them) are practicing the three unit provisional bridge like its their job every free moment they have. The school also cracked down on the seniors two years ago and forces them to practice a lot to ensure they don't have ridiculously high failure rates. So I'm guessing the three unit provisional must be the difficult part of the NERB. NERB does also have a written component, but I hear that it is pretty similar to the NBDE II.
I am being a NERB patient for a senior on Tuesday, so when I learn more about the process, I'll keep you updated.