The MCC course is not mainly to develop CRM skills. It is exactly what it says. It is a Multi Crew Co-operation Course.
It integrates technical interfaces of the aircraft and the absolutely necessary requirement for more than one crew member using the technical skills/knowledge required to run a larger aircraft compared to a single seat trainer. CRM is mainly concerned with integrating and the use of Non-Technical Skills.
Could a single person operate all the switches and monitor the flight and look out on a large momentum aircraft? The MCC introduces these considerations for the first time with theory (25 hrs) and practise in simulator.
CRM is not a specific part of the MCC but it obviously introduces and overlaps the concepts. The full CRM introduction comes when conducting the JAR regulated Initial CRM course ( minimum 2 days in JAR legislation) on joining a new company.
Hope that helps.