You can also do this with a Python script that comes with SASHA-16:

It's in Karina's Toolbox / Python Scripts: "Change Body Texture".

Just double-click it, and a widget pops up where you can select the maps for face, limbs, torso and eyes! Now select the texture maps (and leave blank the ones which you don't want to change).

Click "Make it so!", and you're set.

K