You prob didnt need to re-install on both H.D.D. Only the one that had the virus. Its best to fdisk to make sure you didnt have a boot sector virus.
Have you tried to boot from a boot disc? You may need to set your boot sequence to boot from the floopy first. After it boots from floppy you can see your partions and fdisk from there if you choose to. What happens when you try to boot from the XP disc?
