Replacing Vista with XP on Laptop

[Robertamradio]

I have a Toshiba A205 laptop with Vista installed, but want to replace it with XP.
I have installed the XP BIOS from Toshiba, and tried to install xp SP2 but got the message "Setup did not find any hard disk drives installed in your computer"
When I check this XP BIOS in the Advanced section the cursor skips over the Fujitsu MHY2120BH ATA device entry.

I guess no drivers for the Fujitsu HDD in either the BIOS or XP, but am lost on how to proceed. Help please

 

[CCT]

You will either need to install AHCI Sata drivers OR change the bios settings to recognize the Sata drive as Pata.

 

[Robertamradio]

HDD not recognised

Thanks for that.
In the "Main" page of the BIOS the cursor jumps over the HDD as it scrolls down, so can't get at any sub-menu to alter settings (PATA to SATA). I expected the HDD driver to be in the BIOS download.
If I could find the driver on the Fujitsu site, I am still stuck since I can't install it until Windows is installed (catch 22).
Have I missed something fundamental?
Thanks