ford mondeo auto?

hello just wounderd if you could help me. I sent you a question a few weeks ago about my 2.0ltr auto gearbox i changed the gear box but then i bumped into a few more problems so i took it to ford and they mentioned the p.c.m modual but they said i needed to speak to a auto specailist to see where this p.c.m modaul is located on the vehicle? if you can help me i would be greatful

many thanx