This BIOS update with those 3 install scripts on the USB key is exactly what PC Specialist kindly sent me. I have windows 7 on an Optimus V and the BIOS update fixed the problem for me - I can now use Fn F8 and F9 to adjust my screen brightness and also the Windows 7 Display Control Panel slider also adjusts the brightness (which it wasn't doing before the BIOS update).
Best of luck!