I can't enable AHCI in my BIOS. Trying to install Snow Leo with iBoot.

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I have an XPS Studio 8000 with a Dell Intel P55 motherboard.

I was following the guide to install Snow Leopard until I got to the change your BIOS part. I was able to set my CD/DVD Drive to First Priority and my ACPI to S3. My problem here is that I couldn't change the SATA mode to AHCI, because I don't have the option.

 

I was going to use the experimental [url="http://www.insanelymac.com/forum/topic/279450-why-insanelymac-does-not-support-tonymacx86/"]#####[/url] for 5xxx ATI graphics.

 

Should I try going with the install without changing these option?

How can I change it?

 

My system:

 

XPS Studio 8000

Intel Core i5-750

4GB RAM DDR3

ATI Radeon HD 5770

Intel P55 express-based motherboard. (Dell BIOS)

500GB SATA HDD (With my partition of WINDOWS 7 and a free partition for MAC OSX, NOT ACTIVE)

HL-DT-ST DVD+-RW GH50N ATA Device

 

Help.