The BIOS only allows booting from a CD disc. The BIOS will not let me change to any other format and I am using a Win XP pro bootable disc. I watch on the screen as it loads. After loading and attempting to boot, it starts right back at the black screen with the error message - diskette drive 0 seek failure - below is F1 to start and F2 to enter setup. If I press F1, it asks for the CD and I go through the same process again.
First are you trying to boot a HD from one computer in another computer? If so it won't work. Each installation is "married" to the computer it was installed on. drivers, particularly chipset drivers will only work with the installed computer, so if you "walked' the XP HD from the old computer to the Win8 computer, it's never going to boot.
Assuming you are just trying to boot the old machine with the old XP HD installed. The BIOS battery died means that you lost all your BIOS settings, to include boot order and a bunch of other stuff and getting those settings right may be necessary to get the machine to boot at all. It all depends on what the factory defaults are. Usually they are the safest settings possible but you never know. Pay particular attention to "boot order" and make certain your old XP HD is even recognized in BIOS. If you don't see a 60 Gbyte HD with the manufacturers standard prefix (ST... for Seagate, WD for Western Digital, etc...) that means it's not being recognized by BIOS. Check to make sure it has power and the data cable is plugged in. It's probably IDE and not SATA, so you also have to think about whether or not it's configured "Master" or "Slave" properly. If it's exactly the same as it was when it last worked, don't change anything about the cable or the jumpers.
If the HD is recognized in BIOS the next step is to get it listed as the #1 boot device in the boot order. Then see if it will boot. And old motherboard like that could easily be bad due to bad caps. You can google "bad caps" if you want to know more about that.