If your asking how do you use the same smilies on different skins, they all should naturally appear on different styles assuming you have all of your image paths correct in the Admin CP.
If you are asking how to use different smilies on different skins, you need to have a custom modification for that as it is not possible with the vb core product. I have looked at smilies in the past here as far as modifications and do not believe one exists for this specific application.
You probably will have to request in Unpaid or Paid Requests for a Mod.
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