.If you're interested why not all modified BIOS versions can be flashed the 'usual' way with the official tools, read this:http://forum.techinferno.com/alienware/2252-information-about-bios-updates-a07-a08-higher-m14xr2-m17xr4-m18xr2.html
M18x R2 - 'unlocked' BIOS versions
The following BIOS of the Alienware M18x have been modified so that all hidden menus and options are visible.
It will allow you to further tweak your system and optimize its peformance.
Most of the options are only meant for advanced users. Don’t change anything you’re not sure about.
It's possible that you see options which don’t work for your system, so be careful when changing settings.
In case you mess up and your system refuses to boot applying new settings, remove the AC adapter, battery and coin cell battery in order to clear the non-volatile ram of the BIOS. This should fix most issues.
*UPDATE*Instructions: There are two ways to flash the modified BIOS:
Downgrade to stock A03 by using the USB recover procedure. (Thanks @Scott Matusow for summarizing the procedure). Make sure to closely follow the instructions, and wait until the system is done with the flash. Once you're on A03 flash the modified BIOS using the regular way (using the tools provided by Dell)..This method seems to work very well on the M18x R2, at least as long as you do as instructed. It can be a bit scary though since you can't see what's happening. ..
Flash the BIOS from DOS with the FPT tool. This will only flash the BIOS part and leave out the EC and so on. It's a really safe option when done properly and less scary since you see the progress and information on the screen.
For the USB recovery method follow the instructions in the link above.
Second possibility - flashing from DOS:
Prepare an USB drive so that it can boot DOS. If you don't know how to do this, check the instructions in the spoiler.
Grab the DOS version of fpt for flashing, and my 'prr tool' to circumvent write protection..
Download a '[FPT]' labeled version of the unlocked BIOS. Put the DOS version of the flash tool on the root of the prepared USB stick (fpt.exe and fparts.txt), along with the prr.exe and the file you want to flash (plus the included flash.bat). .
Restart the system and boot from your USB stick. Run prr.exe, then flash the bios by executing the flash.bat file. Wait until the tool completes the flash. If the verification is okay, reboot, else flash again..
Go to the bios, load the default settings and reboot. Done.
NOTE: If you want to use an unlocked BIOS newer than A03 I highly recommend to first flash the desired version of the unmodified BIOS (grab it at the Dell download site).
Once you're on the version you want to unlock, follow the DOS flashing procedure described above.
If you want to go A03 or earlier, the best thing to do is using the USB recovery method.
Here two pics of the most interesting options:
Thanks @Riri-Fifi for the pics and testing!
Thanks @johnksss for testing my prr tool!
Flash and use at your own risk.
I don't take any responsibility for possible damage on your system.
The software which I provide here ('prr tool') comes with absolutely no warranty to the extent permitted by applicable law.
Download the bios files referened in this post from here: