I assume they're all in one file cause the developers probably just shifted the UV's in order to animate his different expressions.
So I wouldn't worry about separating em, applying the textures is dependent on what modelling package you're using, which google will lead you to plenty of ways to do it.
edit: If you'd like, upload the model with his textures and I could put em together in Blender for you. As well as show you how to do it yourself.
So I wouldn't worry about separating em, applying the textures is dependent on what modelling package you're using, which google will lead you to plenty of ways to do it.
edit: If you'd like, upload the model with his textures and I could put em together in Blender for you. As well as show you how to do it yourself.