So you didn't think that the *nix OS on Xbox
forum was relevant?
You almost certainly need to start again, although you might not need the eeprom. Use Halo 2 (or any post 2004 Live-enabled game) and use it to start to log in to live., and hopefully the first thing it will do is update (or in your case restore) the MS Dash. From there you can reinstall the Krayzie 1.1.1 gamesave to your hard drive, then redo your softmod - Basic Install - UnleashX.
If that doesn't work then you need to use xboxhdm, Kingroach NDURE 3.1, stock MS-Dash files and your eeprom to rebuild the disk - see the link in my signature - Build new Softmod disk with eeprom.