QUOTE(Bomb Bloke @ Dec 1 2008, 09:59 AM)

If hardmodded, boot via Slayers or Auto Installer Deluxe and fix the problem.
If softmodded via a game save exploit, boot the relevant game and re-install the softmod.
If softmodded via hotswapping, again, repeat the process (or use your EEPROM backup if you made one).
Worked.
Thank you sir.
Just an fyi, because it may pertain to someone else.
I have xbox version 1.6. With the problem I had, Slayers 2.7 and AID 4.3 would not boot. Slayers 2.6 did. Once fixed using 2.6, then the others would boot.