I think it's separate. When loading a game at first the loading screen appears and one sec after the layer. I did look through 8758 textures and I found and but not the layer.
I'm sorry.So you think the whole black part is the layer, not just the red bar? Hm... I'll have another look later and then I'll be thinking on that...
The file you want is progbar01.dds.I tried recoloring it to make sure, and if I recolor that file, the black bar is whatever color I've recolored it to.