Alright for all the poor souls that come trolling looking for the answer to this problem, here it is. Obtain version 3.0.1 of the xecuter flashbios (it's unofficial, has an option to reflash the EEPROM). Write this to your modchip and boot it. The option for eeprom says "DO NOT USE!" but it works anyway. This will still write a bad eeprom to your box, but your box will be able to boot a modded bios now. Use this opportunity to restore your original eeprom or any other you want.
DO NOT MIX AND MATCH XBOX TYPES AND EEPROMS! THATS WHAT GOT ME HERE IN THE FIRST PLACE!
I also can only vouch that this works fine for 1.6 model xboxes. Hope you have as much luck as I did.