Hi Victo
A temporary (airmans) certificate is what you are issued by the FAA DPE after passing a flight test, or a first certificate from the FSDO perhaps. A certificate based upon your JAA/EASA licence is what you are after, I believe. It will say "issued on basis and valid only when accompanied by foreign pilots licence xxxxxxxx, all limitations and restrictions on foreign pilots licence xxxxxxxx apply". As you hold a JAA CPL/IR/Multi, this should translate to an FAA CPL/IR/Multi to which you will add the Citation type rating to. You will probably have to sit the foreign airmans IR exam.