Yes, Yes, and Yes
The texture will be resized later, but, the engine shouldn't have an issue loading 1 4096 color map, and 1 4096 normal map.
I mean this is just 2 textures. If the engine can't push that......

I have tried setting mtl_bump, mtl_specbump, and no settings at all. Still it bleeds through. I have only found that removing the normalmap from the model in MED corrects this and then I don't get the depth that the normalmap provides..

Although when I set mtl_specBump it tells me...
Skin1:Normal or height map missing...