I just decided to try this to see if I could do it. I copied over the texture of Robe of Volatile Power and replaced the texture of a dress in The Sims with it. It wasn't exactly easy because I had to piece together all the pieces of Robe of Volatile Power over the dress in The Sims. When I finished though, I was surprised that it actually came out kinda good. Here's a picture:
You can see a few mistakes I made but it turned out okay.