Use XP SP2 only, most of XP drivers were built based on XP-SP2.
If you don't have XP with SP 2,get it first:
Download(optional)
Use Nlite to sliptream ICH9 sata driver.
A good guide to guide sliptream sata driver
here: (but do not use the ahci provided by the webpage download the aahci driver below)
Nlite download:
http://www.nliteos.com
ICH9 sata driver, the driver is located in iaAHCI.inf and is called ICH9M-E/M SATA AHCI Controller
Download
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Install Windows XP on Compaq Presario CQ40-115au
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