ya le lo ojeado y he visto como mi dummy.bin en teoria no es el correcto y haber si entre todos solucionamos el drive serial, para los que lo tengamos incorrecto
0000: 44 36 30 38 43 47 38 33 - SS SS SS SS SS SS SS SS D608CG83SSSSSSSS
0010: 31 20 20 20 FF FF FF FF - FF FF FF FF FF FF FF FF 1 ............
0020: FF FF FF FF FF FF FF FF - 41 30 FF FF FF FF FF FF ........A0......
0030: FF FF FF FF FF FF FF FF - FF FF FF FF FF FF FF FF ................
0040: FF FF FF FF FF FF FF FF - FF FF FF FF 41 31 FF FF ............A1..
donde salen los puntos supuestamente nos deberia salir los datos del opt label y del pcb label(que contiene el lector), haber si alguien que haya flasheado con firmtool v1.3.1, nos confirma que les salen los datos correctos,salu2

Aqui os dejo la info del programita para mirar si el drive serial esta bien(en ingles)
Drive Serial Dummy.Bin Fixer - Only for liteon dvd drives
Can be downloaded Here
Required dotNet framework 2.0 (at least).
Version 1.0 - beta
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Usefull for :
- Recovery the drive serial info block (reading those from the dvd labels)
- Double check your dummy.bin file (with the labels)
- Test the consistency of data in the 3 blocks (identify,inquiry,dummy.bin)
- Change/Verify the dvd-key
- Patch the above data (in a new dummy.bin)
How to use :
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- Click on "Browse..", select the Dummy.bin to check/patch
- Click on "Analize", look at the analisys steps colors and at the result panel for details:
--- All green ==> looks good (double check the labels for your safety)
--- 1 or more red/orange ==> problems, but if the "Patched" option is enabled, the file may be recoverable.
* Now
- To view/check the label value, simply click on the thumbnail on the right
- To patch data, select the "Patched" option and edit the boxes (red boxes are missing chars,green are ok), also using on the right thumb, then click on "Save patched file as ..." (DON'T replace the original dummy.bin,its better)
Known issue :
-----------------
Maximizing the form, the "Result" panel is a bit problematic (lost color and span some blank space), click into it and use the cursor keys to scroll.
Hope this help.
La info esta sacada de
http://forums.xbox-scene.com/index.php?showtopic=675326, y lo pongo porque creo que la info es importante para todos los que tengamos dudas en el serial drive