Andry, answer # 5 is very nice & correct. Thank you. I'm an old Frenchman & a translator from Tibetan (into French) ; being a Nyingmapa, I am very interested by Dzogchen. The rainbow body and great transfer ('pho ba chen po) are the same thing : after the dissolution of his/her body into light, the Saint is omnipresent forever (until samsara is empty).