The adding of the ratings is not a problem , they will print a new copy of your licence and will send it to you.
The B1900 rating is a different animal, in theory you can do it wherever you want provided is a JAR TRTO, BUT YOU NEED TO APPLY FIRST TO THE SPANISH DGAC, they will ask you for information about the TRTO (that will include a copy of the TRTO approval, copy of the Simulator JAR approval, copies of the TRI's and TRE's licences), when you provide all the documentation and if they are happy with it , then they will tell you it is ok to do your rating.
I know people who started a TR course without applying to the DGAC first and ended up having a lot of trouble and losing a lot of time to get the rating endorsed on the licence, if you apply beforehand it will take only 2 or 3 days to get it on your licence provided you go yourself to Madrid to feed them the documents as soon as you finish. By the way, you can count 1 or 2 moths before the DGAC guys say they are happy you do your rating ,so be patient.
Make sure you get some copies of the Forms for the TR course (they are the JAR format, but the first page is in spanish and has more stuff to fill in), they have to fill them and sign them in the TRTO when you complete the course.
Si j'etais a ta place, j'atendrais a avoir ta licence CPL avec ME-IR dessus, et appres j'irais a la dgac francaise pour echanger ta licence pour une licence francaise (ca peut prendre 2 ou3 mois) et appres je ferais la qualif sur B1900, t'auras moins d'enmerdes et appres tout tu veux travailler en france si je comprends bien, donc il vaudra mieux avoir une licence francaise.
