Sony Vaio Z115GW Laptop Bios Mod Request

[jaychan71]

Dear Bios Gurus,

I have a Sony Vaio Z115GW laptop with bios details below (screenshot also attached)
  Vaio Z115GW Bios.JPG (Size: 115.43 KB / Downloads: 15)

InsydeH2O ver. 3.5
Bios Version: R3031C3
EC Version: K2020C3
ME Version: 6.0.3.1195
CPU: Intel Core i5 M540 @ 2.53GHz
Memory: 8GB
OS: Windows 7 Pro 64-bit

I would like to turn it into a Hackintosh but it's said that I need to turn on AHCI mode in its bios first.
However there's no such setting for me to change even if I've already changed registry key "msahci" from 1 to 0 in Windows 7.
So I guess I need to flash a modified bios in order to install Mac OS on it.

Could someone help modify it?
Bios download link:
Sony Taiwan Official Site (in Chinese): http://www.tw.sony-asia.com/support/down...Model=true

In case you can't read Chinese, I also uploaded it to my Dropbox.
Here is the link: http://dl.dropbox.com/u/12313222/EP0000260339.exe

Thanks in advance.
If it works for me at the end. I'm willing to buy you a coffee via PayPal.