Windows XP? SATA or normal PATA hard drives? either way the wiring, as you put it, remains the same, just the way in which the system see's the drives changes.
After backing up!!
Enter the bios (usually by pressing the delete button on initial post)
Disable RAID (either SATA or normal IDE PATA)
Set first boot device to CDrom
At this point I would be tempted to pull off the IDE or SATA cable to the second drive (the one on SATA2 or Slave to the master)
Boot with Windows XP in the drive, as to reinstall Windows, delete and remake one partition, format and re-install windows
Once you have XP installed shut down and re-connect the second drive, use disk management tools (Adminitrative tools/computer management/Storage/Disk management) delete and remake the partition to this second drive then quick format
Done
Martin
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