Thanks you guys are all awesome.
It's been quite the learning experience, but the problem error 21 is solved.
Got the xboxhdm_v1.9 package and had to make bootable iso and burn it. Used the C and E backups from slayer's auto installer to put in it. Once the disc was ready, I did a hotswap so that the HDD would unlock, booted from my xboxhdm_v1.9 iso disk that I made and chose option 1 to fully rebuild C and E drives. I then started the 007 hack and made a MS backup and MOD backup. Installed evox dash, made EEPROM backup. FTP'd everything (all paritions) from xbox to PC and burned it for future reference. I also made a new xboxhdm_v1.9 iso bootable CD with my EEPROM info on it, and my backup of C and E that I had just FTP'd.
So now I have a recovery CD for that xbox complete with EEPROMS and hacks, so I don't need to hotswap ever again :-).
Whew! What a rush. I now understand why EEPROMS and xbox backup is an absolute must. Like I said, sometimes you have to learn the hard way

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