Install Windows XP in HP Pavillion A6442P

Get the '32-bit floppy configuration utility' from Intel.Extract it to a folder.
ICH8 sata driver(intel), Download

Next use Nlite to copy your XP cd to a folder and slipstream the SATA drivers.
read the guide here:
http://getlaptopdriver.blogspot.com/2009/10/slipstreaming-guide-to-install-windows.html

Nlite download:

http://www.nliteos.com