Even for me that I am in Mexico now was complicated because PGR requirements .
They ask for( carta de solicitud de datos registrales Expedida por la embajada ) besides fingerprints etc etc
The best way I can help you is sharing this link .
http://www.pgr.gob.mx/servicios/constancia/antecedentes%20registrales.asp
Read it carefully..there is a way to get the datos registrales even if u are outside of Mexico.
It says that the document is ready in 10 days if you have all the requirements but is good for 30 days only
They ask for( carta de solicitud de datos registrales Expedida por la embajada ) besides fingerprints etc etc
The best way I can help you is sharing this link .
http://www.pgr.gob.mx/servicios/constancia/antecedentes%20registrales.asp
Read it carefully..there is a way to get the datos registrales even if u are outside of Mexico.
It says that the document is ready in 10 days if you have all the requirements but is good for 30 days only