The whole BIOS updating procedure should be treated with extreme caution.If you do not encounter any system instability or bugs with the current BIOS version, we suggest that you keep it.This page is meant to describe ways to update the BIOS on a Think Pad that only runs Linux for users that don't have ready access to Windows. Contrary to the name, GRUB for DOS works fine on Linux.
Found chipset "Intel ICH9", enabling flash write... This chipset supports the following protocols: FWH, SPI.
This is a huge drawback for anyone wanting to use SSDs, because it is so much slower. So, even though Lenovo is now offering "Linux diskette" updaters, that will create a bootable floppy under Linux, using a floppy is still not recommended.
Also, it is not possible to install some wireless cards, because only certain models are whitelisted by IBM/Lenovo. See the wikipage Middleton's BIOS for installation instructions, downloads, and more description. Besides, many people don't even have a floppy drive on their Think Pad.
I have a Dell Dimension 8100, and I need to update the BIOS from A08 to A09. Follow the Directions on this site to make your key bootable. Copy the BIOS update to your Flash drive and reboot. I believe Dell's are F12 to select Boot device during the BIOS.
Only problem is that the files supplied by Dell use a floppy disk to do the update, and I don't have a floppy drive. You can make a Bootable USB Key that will work for you. Download the A09 BIOS upgrade for your system that isn't packaged.