With due respect to the FAA, most countries either prefer the JAA or ICAO. While the FAA licenses do come under ICAO, they are not fully complient. A lotta people are confused with the term Frozen ATPL. It only means a Commercial Pilot with the ratings and one who has appeared and cleared the ATPL theory subjects. A Frozen ATPL holder is anyone who has ATPL theory credits. These credits will only be unfrozen after the license holder satisfies the requirements for the issue of a Valid ATPL license, which are 1500 hrs TT of which required Night flyin, IF ..... etc..
The FAA calls it ATP and their system does not permit to write these subjects unless one has actually clocked 1500TT. And thts why, Sandra, ur unable to get ur so called FROZEN ATP in the US. Besides, if any school does advertise it, its misleading as there is no such existing concept of FROZEN ATP in the US.
Best is to.. if you are so desperate, convert your existing FAA license to one that still have this concept, and then write your ATPL theory subjects.
Mind you, and once again with due respect to the FAA system and Pilots under this system, the ATPLS are no walk in the park compared to the theory that you might have been taught to achieve your CPL. This is what seperates most of the Wannabes from the actual pilots!
Best of luck!!