AHCI in Fedora Core 6

[juan.villa]

Hi. I have an intel DG965WH motherboard with an Intel Core 2 Duo 2.16ghz and a Segate Barracuda 7200RPM 360gb HDD (w/ NCQ Support). I installed Fedora Core 6 with "IDE" enabled in the bios instead of "AHCI". After installing Fedora Core 6 and tweaking it I decided to activate "AHCI" in the hopes that it would work flawlessly, but I was wrong. Fedora Core 6 does not boot with "AHCI" activated. The error I get is that it can't find any LVMs and the kernel panics

-> uname -r
2.6.19-1.2895.fc6

-- My kernel boot options are as follow
rhgp quiet pci=nommconf all-generic-ide irqpoll

Any suggestions as to how to fix it?

THANKS!

Note: BIOS is at it's newest revision.