How can I split 1 texture into 6 different ones?

Hello – I’m trying to split the skyrim texture from 1 texture into 6, and was wondering if this is possible?

For instance, that would be the 1 texture, but the thing I’m trying to import it into however does not accept 1 texture, and requires a text/image for each side of the sword, and I was wondering if there is a way to convert/export the individual textures for each side on blender?