The only catch is, skintones created for the old versions may not line up properly on the nipples... depends on the individual skintone. Clothing however should not be a problem at all.
I'm experiencing the misaligned skin tones for a couple of my in game sims using custom skins someone madefor your original meshes. Is there any known mod or hacked object that will let me reassign your new skins to my in-game sims? Probably a long shot but I thought someone here might no if one exists.