Sims models don't have heads, and when you make a sims body, per the EULA you give the rights to EA (Technically). We've been bit by the Jedi Night stuff before. The Tifa, for example is taken from Kingdom hearts.
It's irksome, but there was a project where someone was ripping models from Crisis Core and putting it into FF7. That's when I got the friendly reminder to cut it out.