I'm still having no luck getting back to the flashbios screen.
I've got a 1.6 (not b) and I can't get that power eject at same time to work either.
No matter what I try, I'm always getting the xbox powering up, then straight off, power up then going off again, before finally staying on with a FRAG.
The chip appears to connected ok as I'm getting a blue light on the x icon by the switches.
Grrr.