There are dozens of yahoo answer tools. But very few of them still work today, because yahoo has upgraded their algorithm several times. It’s now much harder to auto the whole job.
Best YS! Manager does everything for you easily, including account creating, account upgrading to LEVEL 2, question content grabbing, question posting, question answering. You can simply define your keywords, money sites, and let it run. Just wait the back-linking juice and traffic coming.