Hi Skaz.
FAR 61.153(d)(3): hold either a foreign ATPL or CPL and IR.
note that you can do a SE or ME ATPL; assuming you are going over to add a fixedwing land JAA rating at Flight Safety, most of their sims are also good for FAA ratings. so you may want to ask if your examiner is dual rated, if not, if an FAA examiner could sit in.
The FAA aeronautical experience requirements are diffrent from ours. check it under FAR 61.159(a).