Change window vista to Xp

Hellow everyone
I have problem when i want to install window xp in my laptop(Acer Extensa 5220).The problem (you cant see the harddisk when u try to install window xp)Please any one have idear for this problem.

It needs SATA drivers.
http://chmochnish.nov.ru/eng/Acer-5220-driver.php
That site links to the drivers for the 5220 model.
The SATA drivers will need to be put onto a floppy disk and when the XP disk asks if you to press F6 if you need to load 3rd party drivers press F6 and follow any instructions that follow.
A quick guide:
http://xphelpandsupport.mvps.org/how_do_i_install_windows_xp_on_a.htm

thanks let me try it.

I neednt sucess.i was already download driver and keep it on floppy.But the same issue.

Any error messages when you got XP to load the drivers from the disc?

ITS SAY
setup could not determine the trpe of one or more mass storage devices installes in your system,or you have chosen to manually specify an adapter.Currently,setup will load support for the following mass storage devices.
<none>
* to specify additional SCSI adapters,CD-ROM drives,or special disk controllers for use with windows,Including those for which you have a device support disk from a mass storage device manufacturer press S

* If you do not have any device support disks from a mass storage device manufacturer,or do not want to specify additional mass storage devices for use with windows,press ENTER

Most likely the drivers were incorrect or it couldn't find them properly.
You could try this method:http://chmochnish.nov.ru/eng/Acer-5220-xp.php

Thanks very much i success to install xp.Thanks for you support.