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If you have an Xbox360 Elite or a Premium with HDMI, then you have a Benq DVD ROM drive. Read this guide to view how to flash this drive without any soldering or wire tricks.

You need for this tutorial:
-An Xbox360 with Benq drive
-A VIA SATA PC Card or a NForce motherboard
-The new BenQ_iXtremev1.1 Multispeed firmware
-The latest version of DosFlash
-Torx 7,10 and 12 screwdrivers to open the Xbox 360 

First you need to open your Xbox360. To do this, follow this guide.

Important Notice:
You can break or kill a perfectly good Xbox 360 if you are not careful so I warn you in advance don't complain or cry to me it you make a mistake, the steps I will describe worked for me and countless others, proceed with caution and make sure you fully understand the process before attempting it.

How to
The first thing to do is boot up your Windows PC and throw in your floppy disk. Right click on the A: drive, go to format, and create a MS Boot Disk. Download the files mentioned above and when the boot disk is done extract the DosFlash16 part of the DosFlash_V1.3Beta file to your floppy disk.
You should have a MS Boot disk floppy with the DosFlash16 folder in it. Now before we reboot the machine into DOS we need to grab the starting address of your SATA card. You can either get this by clicking Start -> Run -> msinfo32.exe.
Go to components, Storage, SCSI. We need the starting address of your SATA card; mine was in the first range… you will see something like 0×00007000……… write down the 7000 part, this is the starting address. Different chipsets use different ranges so you will want to look for your first.

Now you can reboot the PC and boot into DOS using the floppy. This would be a good time to have your XBOX 360 disassembled, plugged in and the SATA going into the benq plugged out. Make sure the 360 is TURNED OFF and plug the BENQ drive to your PC’s satas card using a sata cable.

Type cd DosFlash16 and then:
DosFlash r 7000 1 a0 1 4 A:\orig.bin 0 (where 7000 the starting addres, read above) if you have a VIA
or
DosFlash r 0970 1 a0 1 4 A:\orig.bin 1 (where 0970 the starting addres, read above) if you have a NFORCE

Now get ready and read ahead before hitting Yes. What you need to do is hit yes turn ON the 360, wait 2 seconds turn it off then wait 2 seconds again and turn it back on. If you did everything right it should start reading the banks and creating your orig.bin file. If everything went OK you should see the word “OK” from all the banks. After this is done we can shut down the 360 and reboot back into Windows.

We now need to make the new firmware from our original firmware. You have a decision to either mod your 360 with the “fast” firmware or with a “quieter” firmware. In the file you downloaded, you will see 2x, 5x, 8x and 12x folders. Choose which speed you want. The faster speed, the louder your drive will be.
I choose 12x because my computer room is loud already. Which ever you choose you need to copy your orig.bin file to the directory then run FIRMTOOL.EXE. If everything went OK you should have a benq-ix.bin file in the same directory. Copy that binary file to your floppy disk and boot back into DOS.

Get back into the Dosflash directory and type:
DosFlash e 7000 1 a0 1 4 D8 0    (for VIA)
DosFlash e 0970 1 a0 1 4 D8 1    (For NFORCE)

You may need to do the same procedure as the read, however after I hit yes it started to erase right away. You DO NOT need to erase, but its good to know how to do incase you mess up the next step. Make sure the 360 is powered off before you do the write procedure.

While you are still in the DosFlash directory type:
DosFlash w 7000 1 a0 1 4 A:\benq-ix.bin 0    (for VIA)
DosFlash w 0970 1 a0 1 4 A:\benq-ix.bin 1     (For NFORCE)
Once again you may need to do the same procedure, you may not… In many forums, people suggesting to restarting after each Dosflash command.

Also remember to read the readme.txt from DosFlash for further info.