This the BIOS Mod for ASUS G74SX ver 203. I edited it personally to unlock the bit 15 of MSR at 0xE2. Copy the file to a Fat32 formatted pendrive and then press F4 while booting and select the file to flash. once you're done you wont need to patch the AppleIntelCpuPowerManagement.kext anymore. you'll have native speedstep working. i have tested it and it works flawlessly. Good luck people. leave your comments below.