Hi Ben,
META-Health is not a special method but a methodology - not a tool but a toolbox.
Any technique to safely release emotions, to balance the autonomic state, to tune into the body's wisdom, to renegotiate conflicts and trauma, has a place in META-Health. I find most methods to (technically) be based in NLP - senses, imagery, expression and anchoring - and so the understanding of the principles helps you to adapt or create the technique that is suitable for the circumstances. Safe and sustainable to me is more important than fast, because when a release comes fast it means that the person is ready; but that said, we can use techniques to see this fast change.
We have practical demonstrations and exercises. Practice among students is also encouraged between our classes..
The wiki has a search function, the ebook can also be searched for certain medical terms. These directories are not like a "direct translation" from a disease to a cause (I think this would be rather unethical to claim to be possible)  What's more important for a practitioner though is to think and read symptom descriptions through the lens of the META concept. 
This means to find the individual pattern/s, root cause/s, attached emotions and beliefs, and to reframe and renegotiate and reshape them, if required.

Hope this answers all questions!  
Kora