Well, I ended up just inputting the texture file into the Color Map node, deleting the leftovers from the base mat pose and saving it as a mat file, then applying it to each area that was missing the texture. I'll try my hand at making a mat pose so that it will apply the necessary textures with all of the VSS nodes in place to the whole figure at once, effectively replacing the original mat pose and saving me the step of loading the VSS script controls and synchronizing.