After changes I click - save as...and then save to a separate nif file. Or do you mean something else? I did not understand the question about the Block List so I clicked on the block list button parts of the armor I take from - Fallout 3 goty -> Data -> Fallout - Meshes.bsa I open it in 2 windows. I select any supermutant and copy parts of the armor from other supermutants onto it.