you have ftp access though? download UXE complete and follow the directions to replace your C drive. it's in the usual places under exploits\packages (i think). if you want to get back the original xbox C drive, you can put in a live enabled game and try to update your dash. or you could download slayers 2.6 and extract the iso. inside is a copy of a stock C drive.
edit: don't worry too much...once you've backed up your eeprom, you can basically recover your xbox from anything (well....almost anything). if worse comes to worse, you could pull your hard drive out of your xbox, make an xboxhdm cd and use that to restore your xbox. (i'd try the ftp method first though)
This post has been edited by cmiz: Feb 11 2005, 10:31 PM