I am having the same issue as well. I've followed the instructions exactly, which include downgrading the software on my Sprint Hero back to v1.5, but when attempting to do so, I just get an error stating that it is unable to downgrade. There must be an easy way to root the Hero, it has been out for so long. I'm starting to think this is becoming more trouble than I wanted to put up with, but any help would be appreciated greatly.