No, you can play around with your cache files. I did this for a while, but every time anything happens and resets your cache it is really annoying to re-do it all.
You basically replace your default skin with the skin files you want. It's a lot of trial and error, as you don't know which skin numbers are associated with which skin.
I gave up on it, but for a while I had my favorite skins in HTH rooms. Only I could see them, but that was enough.