I posted a quick 14 step start to finish "cpmplex" butt wrap on this site. I hope it helps you out. In the meantime, if you want to do more complex wraps than Chevy's & diamonds, it is almost mandatory to spend $20 on Dale Clemens Custom Thread Art.
http://momentoffame.com/more_from_person.html?id=9220
Any questions feel free to ask.
Billy@vivona.com