I know its not your hdd, rather the XOS, which like I said has trouble FTPing.
For the FTP, you don't need to use Slayer's. You can use UnleashX, Evox, Avalaunch, or any other dashboard you want. Just make an ISO out of it, and burn it to a CDRW and it should boot once you've run your BIOS (according to your post you can do that much).
QUOTE
Wiil a corrupt evoxdash.xbe or evox.ini file cause these HD problems ?
Most likely not, your Xbox would just freeze. They may have been deleted, or your BIOS might have been told to boot a different XBE files on startup.
For example yours might be evoxdash.xbe, the BIOS's might turn out to be evox.xbe.
So I would go with making an ISO and ftping to that to get your dash set up.