Looking at the Cape Town course, I can't help but wonder how much they can do in three days. Any one of the topics in their syllabus could easily take up weeks. So learning the physical skills well enough that you can do them on demand three weeks later is already quite tough. The other part is the mental component, which is just impossible without a long time of preparation. Sometimes stress can render you ineffective, and for people who are used to thinking and working in a calm environment, that can be a big obstacle. But I guess journalists don't exactly have months.
I'm not really training for the "hostile environment" -- I'm hoping to stay in nice, safe First World countries, though there are some places I'd like to visit if they stabilize. I just take good courses that fit my schedule and budget just for the sake of learning.
Acropolis, let us know if you end up taking some of these courses and maybe give us a quick AAR.