OK let me re-phrase it.
Q1: are there any schools in the USA where one can do a JAA PPL, other than Florida?
Q2: is there any way to do flight training in the USA, in a normal U.S. (non-JAA-approved) school, which can then be used towards a JAA PPL whose checkride (skills test, whatever you call it) is done in the UK? I am 99% sure the answer to this one is NO as I believe that for the hours to qualify they need to be done with a JAA instructor and probably under a JAA approved school.