Satellite P300D-10U - How enable AHCI controller in Bios

I have toshiba satellite P300D-10U with windows vista 32bit , ssd drive 2-nd hdd drive
and I can't ON SATA AHCI Controller in bios.

http://www.toshiba.eu/discontinued-produ...p300d-10u/

What can I do ?
instal new windows 7 32/64 bit and updated bios for this windows maybe then I can ON AHCI Controller in bios

This the bios has the option to run ON AHCI ?

Please answer ,
Thank you .

screen bios:








screen ssd




I changed the value to 0
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci

I instal ATi SATA2 RAID Driver (Preinstall driver)
http://www.gigabyte.com/products/product...id=2500#dl

A modified bios is available with ahci

Is it worth it to install windows 7 64 bit

Can I install a new version of the ati driver for windows 7 32 bit

Please help me ,

I want to use in my laptop in SATA and not use IDE

windows 7 64bit on this laptop will be better for ssd

Does this laptop runs on SATA II (3Gbit / s) or only IDE

BIOS windows vista 32 bit:
http://support1.toshiba-tro.de/tedd-file...170023.zip

http://www.toshiba.eu/innovation/downloa...anguage=42

BIOS windiws 7 64 bit:
http://support1.toshiba-tro.de/tedd-file...170008.zip

http://www.toshiba.eu/innovation/downloa...anguage=42

Thank you all for answer .