I processed the roll, first of all do not waste a roll of EIR on snow in future guys, it was a waste! Only plants and people in coats other than black that did not have snow on them showed up red, the snow was, painfully, white. I did bracket. Got a few good IR shots, one from atop a high building with everybody in the town centre showing up as red, that is about it. A pointless waste of a roll it seems, but it shows the batch is good and the seller has more, so i am going to nab a couple more.
So that has answered the question if it is worth using EIR on snow... no :O