MartinCh
Gordy, so long he revalidates his ICAO CPL, he'd be better of getting part 61.75 foreign licence validation/verification.
Pretty much what I said I thought anyway:
1. Get your ICAO license valid again---it is useless if it is expired.
2. Get an ICAO IR.
3. Pass the FAA ATP written and flight test, (which will include the IR).
Apart from I did not mention about the validation part. The validation of his foreign commercial is only good for obtaining certificates and ratings. He would need to complete an FAA commercial checkride in order to exercise commercial privileges.
FAR 61.175
He still needs to do the initial ATP(H), as he only has ATPL(A).