CHUPS. You've simply edited the skin and put their head on it.. It's not making, since you don't own it. You own probaly 10% of it really. The creator of the base skin owns all. I've done it before. Just telling everyone so they don't ask you to make a custom one since it will erm uh not be well.
Not to interrupt your thing but I know another editor where I could just take a doctor who coat thing and paste it on the player.