So yeah. I've looked places, and found only how to unlock the "Crazy" truck. But, I've got two trucks left to unlock, and the only way I've found out to unlock, is to just race races, and win them. So I just do the quickest track over and over. And it worked. BUT, now it's coming to a halt. I've unlocked MANY paint jobs. I'm missing one paint job, and then the two from the locked ones. Any one know exactly how to unlock trucks?