Long years in between. Just in case you still receive this mail: The polish regisseur made a short movie only. It had be shown (as i was told) on such small-movie insider festivals, one in Israel, one in the US. I found no evidence to be a relative of this terrible Heinrich Hamann, so i did not involve myself or keep more information. You can find an article about the nazi-criminal Heinrich Hamann in the german wikipedia. It looks to me as if fortunaltely the chance is high that he has absolutely nothing to do with your family either. Regarding your other questions i cannot help.