Yes, you can if you have got Vista Business OEM SLP2.0 license preinstalled on the other Lenovo Notebook. Just install Ultimate retail, don't enter a key during setup. Enjoy!
Just wanted to add that I flashed a Lenovo 300 N100 (model: 0768) with the ADI BIOS and the corresponding CERT and all is working 100%. Previous Realtek mod did not show in Everest (as per its' experience).
I tried using that lenovo kit, I think you made it, following directions that were also posted. I got to the point of reading the hex of the bios file but couldn't figure out what exactly to put in there.
Haha, now I feel stupid... I just kept missing the part that says it uses the same code in the BIOS, works perfect.