Focusing group is actually a spiritual practice, at which (all that went to attend it) it in circle with no less than 5 people in each circle. It does not have a definite duration but it is always longer than 15 minutes. It is me, that is speaking out the quotes from the Codex, that others listen to and they focuse on them, thinking intensivelly on the given words, while breathing deeply and slowly - with eyes closed. It is not needed to go strictly by these rules, but by whatever makes best effect on you. Key is to relax and also focuse, and to let go off weakensses inside and outside your mind and body.