Modifying model/serial number in BIOS

[Glaurung-quena]

I have searched for the answer but google is not being kind to me.

I have a T60 in good working order whose BIOS displays a blank line for the "system unit serial number," and the UUID is all zeroes. I'd like it to reflect the number on the bottom of the case.

I tried using the BIOS update utility to enter a new model number, but the first of the two fields is greyed out, so that's not working. Is there another way to alter the relevant BIOS data?

[RealBlackStuff]

Get the HMD here.
It includes an option to make a bootable USB-stick.
Instructions here.

[Glaurung-quena]

Get the HMD here.
It includes an option to make a bootable USB-stick.
Instructions here.

That is exactly what I needed, thank you.