I have tried every link and guide. Creating the custom ipsw is no issue. The issue seems to be getting the ATV in a true recovery mode. Every error I get is a result of the ATV not being in full DFU mode. In wondows it is no problem selecting the ipsw file even when not in DFU.
I did the JB in conjunction with snowbreeze and snowbreeze application told me I was in DFU as well. It just does not work for PC's.
If anyone has had success doing it please let us know!!!!!!