*I have then connected my old IDE drive fully loaded XP I cannot get it to boot from this IDE drive even though I have changed the boot option in the BIOS*
This is because the drivers are for your old machine and not the new board
set it to boot from DVD first boot device and IDE as second, disconnect the SATA for the moment.
Boot from XP CD and do a repair install as this will then set the drivers for the new board into the old Xp installation.
Reset BIOS on completion to IDE as first boot device and it shoukd then boot into XP