...and also me !
I also have exactly the same initial problem. Has anyone managed to work through this problem and come to a conclusion yet.
I have not upgraded or anything, my PC has just decided to do this. Booting
from the XP setup floppy disks, gives me the biosinfo.inf & error 4096 as mentioned before.
Like the others, I really want to avoid re-formating the c drive.
Kind regards
Solareclipser