Yes exactly though make sure you copy the whole part, I mean check the UVs and see how much area they are covering in original texture then take that much part and paste it in C1 (all texture files). Sometimes it's difficult to make space for new textures but in your case you can replace shoe textures with feet since shoes are no longer used.
Also when you're done with textures make sure you move UV to the new location where you pasted textures.
You might get a bad looking texture seam but lets worry about that later.
I was writing the first reply which got ninjaed by you so some payback