Thanks for you offer to help. I got it installed in the mean time though, via.
1.Download floppy version of intel matrix.
2.Extract the drivers to a floppy then to a map on your disc.
3.Update the IDE/SATA driver to Intel 82801GR/GH SATA AHCI from the extracted floppy.
4.Reboot and enter BIOS and set the IDE to AHCI.Save and exit.Now windows will boot and find a new hardware and will reboot again.
5.Install Intel Matrix Storage Manager latest (CD version) and reboot.
I'll have to wait for my sata hdd returing from rma to do some benchmarking.
The OP forgot to inform when he thinks the drivers should be installed etc..., but I did also about the same as you did, I had earlier a few days ago allready created the floppy and just modified it with Notepad. Installed the modified driver, then the .reg file and rebooted and changed the ACHI setting. Boots ok, but I am unable to install the Intel Matrix Storage Manager as it says "This computer does not meet the minumum requirements for installing this software". How did you fix that? Trying to install a 7.8.0.1012 over XP Pro SP3 (English). One curiosity was that the driver I installed before restarting had to be intalled again since it was gone after restart. I am now wondering should I have had Intel drivers installed before the whole procedure (just installed this system today).
Enable Intel AHCI under XP [Case Closed => read second last post]
in Pinned Topics regarding Windows XP
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The OP forgot to inform when he thinks the drivers should be installed etc..., but I did also about the same as you did, I had earlier a few days ago allready created the floppy and just modified it with Notepad. Installed the modified driver, then the .reg file and rebooted and changed the ACHI setting. Boots ok, but I am unable to install the Intel Matrix Storage Manager as it says "This computer does not meet the minumum requirements for installing this software". How did you fix that? Trying to install a 7.8.0.1012 over XP Pro SP3 (English). One curiosity was that the driver I installed before restarting had to be intalled again since it was gone after restart. I am now wondering should I have had Intel drivers installed before the whole procedure (just installed this system today).