Maan, this is an interesting spread. I think that I will give it a try. I think that it may be easier with a focused question, but I didn't think that it was required. Only that a focused connection or mediatation to connect with a past life is more what I think is helpful.
I have done past lives readings, but with regular spreads. I usually use the celtic cross for most all of my readings and so do the same for past life readings. I have tried a mirror type of spread, kind of a take off of the two decision spread, where one side is past life experience and the other side is current life experience and then you can see clearly how the past life is effecting the current one.
Hope that made sense. Tell us how your throws go. Please