Unrooting Htc Hero

[datboy1212]

I was trying to restore a nandroid backup after flashing the Fresh rom and received errors. I also tried flashing new images to see if that was the problem and I still received errors that everyone down at XDA were complaining about also. Right about now, all I want to do is to unroot my phone to start off from scratch but when I do I get the Error[140] no matter what (I tried literally 20 times in almost every way possible). I was wondering if someone could possibly help me get back to stock, though I'm not sure how it would be possible, if I am installing the RUU incorrectly or if I need a nandroid backup from the stock sprint htc rom. Thanks