Enabling AHCI after install?

[Sp00n]

I've installed xp months ago on my pc with the drive in legacy IDE due to various reasons, now i would like to run it in ahci which i believe to be the quickest however setting it now causes a BSOD.

Is there anyway to enable it or am i looking at a fresh install + F6 driver install?

 

[DJSKYLINE]

dont know if it helps but... from wikipedia

Enabling AHCI in a system BIOS will cause a 0x7B Blue Screen of Death STOP error on installations of Windows XP where AHCI/RAID drivers for that system's chipset are not installed. Switching to AHCI mode requires installing new drivers before changing the BIOS settings.