Bios Mods -The Best BIOS Update and Modification Source

Hi, i'm having some problems building my hackintosh 'cause i need to put sata in ahci mode and my bios doesn't allow me to do it.
the sticker on my mobo says it's a Foxconn 15235, and these are my specs:

BIOS Type: Phoenix-Award
BIOS Date: October 1st 2007
BIOS ID: 10/01/2007-PT890-8237A-6A7L8FKEC-00-None
BIOS OEM: PT890M02 PBSFC2MB.P10 100107 - PBSFC2MB.P10
Chipset: VIA 82C327 rev 0
SuperIO: Unknown
Manufacturer: PACKARD BELL BV
Motherboard: IMEDIA X1022C

i couldn't find the original bios 'cause on the foxconn site there's only the vga integrated version of this mobo and mine hasn't vga. can somebody help me? i need to enable ahci mode and , if possible to use 4gb of ram, 'cause i think it only supports 3gb.

Thank you!!

Well... The VGA connectors could be removed from a OEM-motherboard.

Ok, so i finally found the real model of my mobo, it's a pt8907mb 2.0 8ers2h.
On foxconn site i've only found this one: http://www.foxconnchannel.com/support/do...-us0002143
is it the right one? can someone mod it to enable ahci?
thank you!