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 Caro, he was totally smitten. A herd of wild horses couldn't drag him away, because the competition for her heart was one he planned to win .