Ivo Janeček has been guiding participants of his seminars to walk over fire since 1999. During this period he verified many times that preparation can be done in many different ways, but the basic is always in the state of consciousness and readiness of body.
Ivo says about firewalking:” I love firewalking as a meditation which is 100 % truthful. You cannot pretend anything. If you are not true to yourself and you are not in the present moment, you will certainly feel it. It is not a tragedy, but it can be unpleasant. However, it is really worth going through his meditation, it is an absolutely amazing experience.”
More about Ivo on www.firewalking.cz.