Not sure if this is the official source of MIDs -
http://www.itu.int/online/mms/glad/cga_mids.shIf it is, then the flags table needs updating as follows:
1. Add entries for:
241 Greece
262 Montenegro
357 Panama (Republic of)
370 Panama (Republic of)
414 China (People's Republic of)
542 Niue
566 Singapore (Republic of)
745 Guiana (French Department of)
2. Change 329 from Guadeloupe to France