Hey Frumpco_,
I got this from some other site. Can't remember where but I'm waiting to get my own vivo so I've been doing some research.
You need to use the pci card with the x800pro still in the agp slot.
Then you boot up to dos using a boot disk with flashrom in it.
type
flashrom -i
and it should tell you which adapter your x800 is in.
then you put in a command like
flashrom -p -f 0 bios_name.bin
where
0 is the adapter
-f is to force the flash
bios_name.bin is whatever the bios file is
*noting that 0 is the number zero
I think those are the steps to reflashing the original bios back onto there.
But I'm not sure so
wait for someone more experienced to confirm this.
I take no responsibility in what happens.
Good luck and let me know how it goes.
EDIT: What card does he have btw? Cause I'm looking to pick up a Sapphire X800Pro vivo non-toxic.