Hi there
Get an FAA medical from Doc Killeen before you go. You'll be able to do the FAA exams over there and arrange to do some flying with the Aviator school and then sit for the FAA PPL.I assume you already have an Irish or JAA PPL. Then sit the MEP written and do the requisite MEP training, at a considerably lowerrate than the JAA students are charged.
regards
TDD