[BeatingDeadHorse]
I'm in the same boat. I installed ICE to 1.0 xbox. Saved the TSOP to Bank 1. And I was able to boot retail kernal. But I never set the clock (although it should be accurate as the unit was never unplugged more than a couple of minutes at a time, although it has been sitting my office (plugged in) for a couple of months, rarely turned on).
Anyways, I ran into trouble getting XBMC to my liking on this box. So I performed the drive upgrade wizard using a source drive from my other (1.4) box. The 1.4 box is back in action unscathed. But on my 1.0 box I believe I attempted to Launch retail kernal before locking drive. I got a message from the dash about xbox may connect to the internet and update dash. The box rebooted and I've not been able to get back to dash even after locking the drive.
I ftp'd the original 1.0 dash over. No dice,
I ftp'd the original 1.4 dash over. No dice,
Tried clearing the CACHE, it was already empty. So No dice.
Even If I can't get to the MS dash ever again, I'm not too concerned about it, since I never play Live games. My only beef is I typically use the dash to play DVDs. If that functionality can be replaced I'd be happy.
[/BeatingDeadHorse]