Contact the authorities that issued your license, requirements may, and do vary from one country to another (although all are supposed to follow JAR's).
If it is a spanish issued license and you are going to use a foreign TRE check with them beforehand if it's ok and get the renewal form in the spanish version (down-loadable from the spanish website, not easy to find but it's there).
I read a while ago that in order to renew in one sim session you need to have flown the aircraft in the preceding months, but can't remember how many sectors or hours, if you haven't flown the aircraft in the preceding year then you need to do a 2 sim sessions, one as training and the other for renewal.
AFAIK in Europe there are CRJ simulators in Berlin and in Madrid, there are probably more.
Good luck with your renewal
