I haven't gotten it to completely work yet, but making more progress. I was having that same not eligible message that a lot of us are having. I tried different files, etc. with no luck. Then I remembered that I used tiny umbrella when restoring one of my iphones. So, here's what I did..... (kinda long)
Recreated new file in pwnage tool
opened tiny umbrella
clicked on start tss server
Selected the new file
It verified and started writing the file! YEA!
Well, it would get to 99% and hang there...BOO...
Did a little research and found possible solution...reinstall itunes
So did that....
Had to create a new file but this time it went all the way through until it got to verifying, then it shows restore a couple more times and bombs with a 1600 error.
Now if you want to try again, you need to create a new file with pwnage tool everytime.
All that being said...it seems there may be a way to still get this file onto the atv2.
I discovered all that at 1am, so if someone wants to go through this and try it....it may work (I think mine got semi-bricked cause the cable got disconnected mid-update)
Perform these steps at your own risk, not guaranteed to work.
Also....I edited my hosts file to point to saurik's server.