How to enable AHCI on Intel ICH9 under XP - DURING INSTALL Ok, I gave this a shot, and seems to be working? STEPS: 1. Unpacking the Drivers same as above 1.1 Extracting .IMA file with Magic ISO same as above 2.1 Preparing the drivers Open the IAAHCI.INF with Notepad. Use CRTL-R and you should get a “replace” window. In the first input window you type “2821” and the second “2923”, so you will replace all “2821” text to “2923”, and click “Replace All”. Replace the line: PCI\VEN_8086&DEV_2923&CC_0106.DeviceDesc = "Intel(R) 82801HR/HH/HO SATA AHCI Controller"To: PCI\VEN_8086&DEV_2923&CC_0106.DeviceDesc = "Intel(R) ICH9 SATA AHCI Controller" Save the file under the same name, e.g. IAAHCI.INF and exit Notepad. Open the TXTSETUP.OEM with Notepad. Use CRTL-R and you should get a “replace” window. In the first input window you type “2821” and the second “2923”, so you will replace all “2821” text to “2923”, and click “Replace All”. Replace the line: iaAHCI_ICH8R = "Intel(R) 82801HR/HH/HO SATA AHCI Controller (Desktop/Server/Workstation)"To: iaAHCI_ICH8R = "Intel(R) ICH9 SATA AHCI Controller" Save the file under the same name, e.g. TXTSETUP.OEM and exit Notepad. 2.2 Preparing the media IAAHCI.CAT IAAHCI.INF - this has been modified by you IASTOR.CAT IASTOR.INF IASTOR.SYS TXTSETUP.OEM - this has been modified by you Choose one of: A: save these files to floppy (F6 method) B: integrate using nlite. (slipstream method) 3. Creating Windows registry file Not needed. After installing XP with this method, the registry already contains these settings. 4. BIOS Settings Restart the computer and enter the BIOS (Mostly entered by pressing DEL). Make the settings: SATA RAID/AHCI Mode [AHCI] SATA Port0-3 Native Mode [Enabled] For ASUS P5K motherboards (IF present in BIOS, please report if not present.): SATA Configuration [Enhanced] Configure SATA as [AHCI] Also, dont forget to set BOOT ORDER to CD/DVD first, HDD second. Next, SAVE and EXIT. 5. Installing the drivers in Windows Put your xp installation disk in the drive. If you saved files to floppy, hit F6 at the prompt. 6. Final installation check same as above. 7. Editors thoughts Seems to be working on P5K-VM. Anyone else try this?