Acer Extensa 5220 same problem with SATA.
Dowloaded the drivers SATA from Acer.
Copied to USB , files in/out original folder .
Inserted while I was installing the XP .
Did the F6 gig,didn't worked.
Restarted the whole process with usb inserted and .... MIRACLE !!!
My HDD was there.
Good luck :)