When Ty Harrison signed up to sponsor Carolyn Sheppard's barrel-racing career, he knew he was in for a bumpy ride. The diminutive rodeo star had a reputation for being a firecracker and was as independent as they came. So he wasn't too surprised that she practically had to be roped and tied before she shot a commercial for his company's boots. But not even the photos and the PR people had prepared him for the real thing. And when he finally did corral...