Bios Mods -The Best BIOS Update and Modification Source

Hi, i need to install Windows XP but when try install appears a error "acpi.sys".

I need to disable AHCI mode for install XP but in bios can't modify this option.

Can modify the bios to unlock?

P.S: Sorry for my bad english.

Link BIOS:

BIOS

Thx

Hello guys,
I would like to sligtly improve the performance of my notebook.

It is possible to unlock the bios to access to some more setting about clock and ram?


Original firmware

http://ftp.hp.com/pub/softpaq/sp77001-77500/sp77233.exe

i have the same notebook hp 250 g2 i moded the bios with insydeh20 but i cant flash it help