cant install dsdt

[karamatks]

help plz
i hav installed snow leopard and updated to 10.6.3
i hav got two problems
1# em geting error when installing dsdt.aml so i cant install dsdt.aml
2# every time when restarting pc i geting f1 obtion for default bios setings or del to setup bios again coz cmos unable to load previously setuped bios... so i hav to setup again to setup sata to AHCI for working
plz help
asus p5n73-cm
core2due
evga nvidia 9500gt