Is it possible to take just parts of the SSO programme and gain fewer credits?

No, all students must take all elements of the programme which are designed to complement one another.  The exceptions to this rule would be students with special needs consequent on disability for whom a reduction in workload might be suitable, and students returning for a second semester who have already taken some courses.  Exceptional cases are dealt with ad hoc and students falling into these categories should make detailed arrangements with SSO staff before the start of the semester.