The notebook will start fine into Windows XP *or* from a boot CD, so I know the drive is working to some degree. However, WindowsXP does not "see" the drive in the Storage areas. It does list the drive in the Device Manager, but with the yellow circle and exclamation point, saying that it cannot load a driver for the device.
What I have tried:
I went to Acer and looked for a driver, no luck.
I went to LiteOn and looked for a driver, no luck.
I uninstalled the DVD drive, scanned for hardware changes, it found the drive but no driver.
I uninstalled the IDE controllers and restarted, it found all drives but the DVD/driver was still in error.